w3c: fix HTML syntax errors

Fixes #64

All pages:
- add `urlencode` when passing the version to a custom stylesheet;
- set meaningful values of `alt` and `title` for QR-Code images.

Install page:
- the form's `action` attribute must be non-empty;
- the `valign` attribute is deprecated.

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

3 files changed, 4 insertions, 3 deletions

diff --git a/tpl/includes.html b/tpl/includes.html
index cc573801..efc658eb 100644
--- a/tpl/includes.html
+++ b/tpl/includes.html
@@ -6,4 +6,4 @@
 <link rel="alternate" type="application/atom+xml" href="{$feedurl}?do=atom{$searchcrits}#" title="ATOM Feed" />
 <link href="images/favicon.ico#" rel="shortcut icon" type="image/x-icon" />
 <link type="text/css" rel="stylesheet" href="inc/shaarli.css?version={$version|urlencode}#" />
-{if="is_file('inc/user.css')"}<link type="text/css" rel="stylesheet" href="inc/user.css?version={$version}#" />{/if}
+{if="is_file('inc/user.css')"}<link type="text/css" rel="stylesheet" href="inc/user.css?version={$version|urlencode}#" />{/if}
diff --git a/tpl/install.html b/tpl/install.html
index 32b8811b..df42bf6d 100644
--- a/tpl/install.html
+++ b/tpl/install.html
@@ -5,7 +5,7 @@
 <div id="install">
 <h1>Shaarli</h1>        
 It looks like it's the first time you run Shaarli. Please configure it:<br>
-<form method="POST" action="" name="installform" id="installform">
+<form method="POST" action="#" name="installform" id="installform">
 <table>
 <tr><td><b>Login:</b></td><td><input type="text" name="setlogin" size="30"></td></tr>
 <tr><td><b>Password:</b></td><td><input type="password" name="setpassword" size="30"></td></tr>
diff --git a/tpl/linklist.html b/tpl/linklist.html
index d5bfadf8..16fc842d 100644
--- a/tpl/linklist.html
+++ b/tpl/linklist.html
@@ -52,7 +52,8 @@
                 <span class="linkarchive"><a href="https://web.archive.org/web/{$value.url|htmlspecialchars}">archive</a> - </span>
                 {/if}
                 <div class="linkqrcode"><a href="http://qrfree.kaywa.com/?l=1&amp;s=8&amp;d={$scripturl|urlencode}%3F{$value.linkdate|smallHash}"
-                    onclick="return showQrCode(this);" class="qrcode" data-permalink="{$scripturl}?{$value.linkdate|smallHash}"><img src="images/qrcode.png#" title="QR-Code"></a></div> -
+                    onclick="return showQrCode(this);" class="qrcode" data-permalink="{$scripturl}?{$value.linkdate|smallHash}">
+                    <img src="images/qrcode.png#" alt="QR-Code" title="{$value.localdate|htmlspecialchars}"></a></div> -
                 <a href="{$value.url|htmlspecialchars}"><span class="linkurl" title="Short link">{$value.url|htmlspecialchars}</span></a><br>
                 {if="$value.tags"}
                     <div class="linktaglist">