Accessibility: specify the HTML lang attribute

The lang is based on the user defined one. If the language is automatic, no language will be specified.

Fixes #1216

Merge pull request #1182 from ArthurHoaro/feature/session-protection-stay-login

Do not check the IP address with session protection disabled

Merge pull request #1229 from ArthurHoaro/travis/php-7.3

 Run Shaarli's tests against PHP 7.3 RC1 on Travis

Run Shaarli's tests againt PHP 7.3 RC1 on Travis

Merge pull request #1261 from trailjeep/patch-1

Update Community-&-Related-software.md

Merge branch 'master' into patch-1

Merge pull request #1262 from trailjeep/patch-2

Update Community-&-Related-software.md

Update Community-&-Related-software.md

Update Community-&-Related-software.md

Merge pull request #1258 from virtualtam/refactor/phpdoc

Replace Doxygen with phpDocumentor to generate reference documentation

Merge pull request #1257 from virtualtam/security/composer-advisories

composer: enforce PHP security advisories

Merge pull request #1259 from virtualtam/fix/render/strip-opengraph-description

fix: ensure HTML tags are stripped from OpenGraph description

fix: ensure HTML tags are stripped from OpenGraph description

Fixes https://github.com/shaarli/Shaarli/issues/1250
Relates to https://github.com/shaarli/Shaarli/issues/1242

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

doc: remove Doxygen configuration

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

doc: add Make target to run phpDocumentor with Docker

This target provides a convenient way for running phpDocumentor without
cluttering the system's configuration with PHP extensions, nor the
Composer dependencies.

See:
- https://hub.docker.com/r/phpdoc/phpdoc/dockerfile
- https://github.com/phpDocumentor/phpDocumentor2#via-docker

An alternative is to download the PHAR and run it locally:
- https://docs.phpdoc.org/getting-started/installing.html#phar

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

doc: add phpDocumentor configuration

See:
- https://phpdoc.org/
- https://docs.phpdoc.org/references/configuration.html
- https://github.com/phpDocumentor/phpDocumentor2

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

composer: enforce PHP security advisories

This adds roave/security-advisories to prevent installing PHP packages with
known vulnerabilities with Composer.

See:
- https://github.com/FriendsOfPHP/security-advisories
- https://github.com/Roave/SecurityAdvisories

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

Merge pull request #1248 from virtualtam/refactor/namespacing

Ensure all PHP classes are properly namespaced

Optimize and cleanup imports

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

API: update test regexes to comply with PCRE2

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

composer: add and document optional PHP extensions

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

namespacing: add plugin tests to \Shaarli\Plugin\[...]

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

namespacing: \Shaarli\Plugin\PluginManager

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

namespacing: \Shaarli\Netscape\NetscapeBookmarkUtils

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

namespacing: \Shaarli\Router

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

namespacing: \Shaarli\ApplicationUtils

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

namespacing: \Shaarli\Updater

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

namespacing: add curl-ext to suggested dependencies

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

namespacing: move LinkUtils along \Shaarli\Bookmark classes

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

namespacing: \Shaarli\Bookmark\LinkFilter

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

namespacing: \Shaarli\Bookmark\LinkDB

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

namespacing: \Shaarli\FileUtils

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

namespacing: \Shaarli\Render\{PageBuilder,ThemeUtils}

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

namespacing: move HTTP utilities along \Shaarli\Http\ classes

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

namespacing: \Shaarli\Http\Url

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

namespacing: \Shaarli\Http\Base64Url

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

namespacing: \Shaarli\Feed\{Cache,CachedPage,FeedBuilder}

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

namespacing: \Shaarli\Exceptions\IOException

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

namespacing: \Shaarli\History

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

Merge pull request #1233 from shaarli/doc-fix-homepage-icon

doc: fix homepage icon

Merge pull request #1251 from shaarli/doc-update-php-compat

doc: update PHP compatibility table

doc: fix homepage icon
The icon did not display properly on https://shaarli.readthedocs.io/en/master/

doc: update PHP compatibility table

Ref https://github.com/shaarli/Shaarli/issues/1249

Merge pull request #1234 from virtualtam/lint

Setup PHPCS and cleanup linter configuration

lint: fix line-length warnings

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

lint: apply phpcbf to tests/

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

lint: apply phpcbf to index.php

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

lint: apply phpcbf to plugins/

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

lint: apply phpcbf to application/

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

lint: setup PHPCS for PSR-1 and PSR-2

Relates to https://github.com/shaarli/Shaarli/issues/95

See:
- https://github.com/squizlabs/PHP_CodeSniffer
- https://github.com/squizlabs/PHP_CodeSniffer/blob/master/phpcs.xml.dist
- https://www.php-fig.org/psr/psr-1/
- https://www.php-fig.org/psr/psr-2/

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

lint: remove unused tools

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

Merge pull request #1247 from llune/patch-5

add label to form - accessibility issue

Merge pull request #1246 from llune/patch-4

fix translation string

add label to form - accessibility issue

Don't use placeholder instead of label for form input.

fix translation string

Merge pull request #1236 from bisherbas/patch-1

Update session start condition

Update session start condition

Recommended method for PHP >= 5.4.0 as seen here https://stackoverflow.com/questions/6249707/check-if-php-session-has-already-started

Per https://shaarli.readthedocs.io/en/master/Server-configuration/ Shaarli supports PHP >= 5.6

Merge pull request #1235 from ilesinge/patch-2

Dead link on dead link detector tool

Dead link on dead link detector tool

Author's repo moved to Framagit

Merge pull request #1230 from virtualtam/composer/netscape-parser

Composer: bump netscape-bookmark-parser to 2.1

Merge pull request #1232 from shaarli/doc-rm-firefox-share

remove firefox share documentation

Merge pull request #1221 from nodiscc/doc-refactor-index-features2

doc: refactor documentation homepage

remove firefox share documentation
Firefox Share integration has been removed in https://github.com/shaarli/Shaarli/pull/1026
Firefox Share is not available anymore in any ESR/release versions of Firefox

Merge pull request #1231 from shaarli/revert-1220-url-filter

Revert part of #1220

Revert part of #1220
Fixes #1177
The `url` template filter is [only supported in Mkdocs 1.0+](https://github.com/mkdocs/mkdocs/blob/master/docs/about/release-notes.md#internal-refactor-of-pages-files-and-navigation)
Readthedocs.org uses Mkdocs `0.17.3 ` while `make htmldoc` fetches the [latest version from pypi](https://pypi.org/project/mkdocs/) which is `1.0.4`.
Following https://github.com/shaarli/Shaarli/pull/1220, building the docs fails with https://readthedocs.org/projects/shaarli/builds/7886340/

Composer: bump netscape-bookmark-parser to 2.1

Relates to https://github.com/shaarli/Shaarli/issues/1227

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

Merge pull request #1205 from ArthurHoaro/feature/opengraph

Add OpenGraph meta tags on permalink page

Merge pull request #1208 from ArthurHoaro/feature/select-all

Add a button to toggle all checkboxes of displayed links

Merge pull request #1211 from ArthurHoaro/hotfix/img-request

Fix a bug making thumbnail to request the current page

Merge pull request #1212 from ArthurHoaro/hotfix/hashtag-md-escape

Fix hashtags with markdown escape enabled

Merge pull request #1144 from ArthurHoaro/feature/sticky

Add a button to set links as sticky

Sticky feature - Add translation and display for logged out users

Add a button to set links as sticky

Meaning that they always appear on top of all links

Fixes #186

Merge pull request #1220 from nodiscc/doc-robots-noindex-nofollow

add "noindex, nofollow" HTML robots meta-tag to documentation pages

Merge pull request #1207 from ArthurHoaro/feature/cors

Add CORS headers to REST API responses

Merge pull request #1215 from ArthurHoaro/hotfix/tag-deletion

Fix a JS bug preventing AJAX tag deletion to work

Merge pull request #1213 from ArthurHoaro/plugins/isso-icon

Isso plugin: add an icon in linklist if enabled

doc: server config: basic usage of robots.txt/HTML robots meta-tag/crawler control mechanisms

add "noindex, nofollow" HTML robots meta-tag to documentation pages
 - Customize the "readthedocs" mkdocs theme: https://www.mkdocs.org/user-guide/styling-your-docs/#customizing-a-theme
 - Adds a '<meta name="robots" content="noindex, nofollow">' HTML tag on each page
 - Do not include robots directive on readthedocs.org, only in local builds

documentation: refactor documentation homepage

- simplify/organize feature list and contributing section
- move bug reporting/contact information to Contributing section
- unclutter

Ref https://github.com/shaarli/Shaarli/issues/1148#issuecomment-397871451 and https://github.com/shaarli/Shaarli/issues/598

Fix a JS bug preventing AJAX tag deletion to work

Fixes #1214

Isso plugin: add an icon in linklist if enabled

Fixes #1075

Fix hashtags with markdown escape enabled

They're now transformed to markdown syntax links before processing them through Parsedown.

Fixes #1210

Fix a bug making thumbnail to request the current page

Merge pull request #1209 from ArthurHoaro/hotfix/history-delete

History: fix a bug on bulk deletion where only one deletion were regi…

History: fix a bug on bulk deletion where only one deletion were registred

Add a button to toggle all checkboxes of displayed links

Related to #1160

Merge pull request #1206 from ArthurHoaro/hotfix/search-input-size

Fix input size for dropdown search form

Add CORS headers to REST API responses

Fixes #1174

Add OpenGraph meta tags on permalink page

Includes:
  - og:title
  - og:type -> article
  - og:image -> if there is a thumbnail
  - og:url -> permalink
  - og:description -> first 300 chars of raw description
  - article:published_time
  - article:modified_time
  - article:tag -> one OG meta tag for each shaare tag

Fixes #258

Fix input size for dropdown search form

Merge pull request #1193 from llune/patch-1

Update French translation

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CHANGELOG

Merge pull request #1204 from ArthurHoaro/hotfix/docker-build-failure

Fix docker build

Fix docker build

WT has php-gd as a requirement, which isn't available in composer docker image

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Merge pull request #1203 from ArthurHoaro/changelog

CHANGELOG

Update AUTHORS

Signed-off-by: ArthurHoaro <arthur@hoa.ro>

CHANGELOG