hgweb: Added safety net for PATH_INFO starting with double slash.
This happens e.g. when using the following apache config:
RewriteRule (.*) /hgwebdir/$1 [PT]
instead of the less readable (but more correct):
RewriteRule (.*) /hgwebdir$1 [PT]
changeset: 0:9c2cf2b35aa7
user: test
date: Mon Jan 12 13:46:40 1970 +0000
summary: add foo
changeset: 1:3756a9556b89
tag: tip
user: test
date: Mon Jan 12 13:46:41 1970 +0000
summary: change foo
2 revisions:
9c2cf2b35aa7
3756a9556b89