coal: remove dead CSS code

url: detect scheme with a regexp instead of urlsplit() The latter says 'c' is a scheme in 'c:\foo\bar'

url: fix file:// URL handling

bookmarks: fix strip handling

fix zeroconf handling for hgwebdir (error found by pychecker)

fix missing import, spotted by pychecker

remove unused variables

Fix https availability checking thanks to Augie Fackler for noticing it.

rebase: avoid redundant merges (issue1301)

Make contrib/buildrpm work on Fedora 9. mercurial.spec had bitrotted. These changes makes it possible to build an rpm that is usable. Only minimal changes has been made, and there is plenty of room for improvement.