hgweb: disable branchtip filtering for hgweb hgweb make extensibe use of branchtip we should. - Our branchtip wrapping make the function expensive, killing performance. - We do not filter anything un hgweb yet.

syntax: re
/figures/[^/]+\.png$
^docs/build/
^docs/html/
^html/
\.pyc$
~$
\.swp$
\.orig$
\.rej$
\.err$
^tests/easy_run.sh$
^build/
^MANIFEST$
^docs/tutorials/.*\.rst$