hgweb: fix handling of path for old style template - path from old style are prefixed by '/', make cleanpath strip them - make manifest() use relative paths, that was the only function using '/' prefixed paths

#!/bin/sh

hg
hg -q
hg help
hg -q help
hg add -h
hg add --skjdfks
hg help diff
hg help status
hg -q help status
hg help foo
hg skjdfks

exit 0