404 and 502 etc. files should use href="static.css" for subdirectory support
Created by: fire
When loading gitlab under a subdirectory, if Gitlab used "static.css" instead of "/static.css" the stylesheets would load for the error pages. Normally the static.css would at the same level as the 404.html etc. document so both cases should work.
<link href="/static.css" media="screen" rel="stylesheet" type="text/css" />becomes
<link href="static.css" media="screen" rel="stylesheet" type="text/css" />