>>19
This feature was intended to avoid any use of cookies and is actually a hack done in nginx.conf
Here's the relevant part.
#replace css and add query string to all internal links
subs_filter_bypass $bypass;
subs_filter '<LINK href="/static/styles/(.*?).css"' '<LINK href="/static/styles/$arg_css.css"' or;
subs_filter '<A href="((?!http).*?)(#.*?)?"' '<A href="$1$is_args$args$2"' gr;
subs_filter '<FORM action="(.*?post)"' '<FORM action="$1$is_args$args"' gr;