rewrite: add support for js rewriting ';http:\\/' urls
add 'parse_comments' rule options for parsing comment contents via regex
banner: simplify banner insertion check, only insert for top frame, and check
for canon_url matching current href at top before redirecting to top
replace em_ -> mp_ as default embedded mod
banner: add back inner frame update of banner on load, if html
rewrite: banner only mode encodes to utf-8, adjusts length
fix self-redirect check with relative urls in Location
tests: add test for rel self-redirect
update for 0.5.4 release