Add shortcut icon (favicon) to the forum theme

[AnrDaemon]

Website pages contain this reference:

Code:

<link rel="shortcut icon" href="//www.hazeron.com/favicon.png" type="image/png"/>

but not the forum pages.
This makes it a little bit weird to have sleeping tabs show proper shortcut but once you activate it and the tab is loaded, the icon change to generic white sheet.