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]
header = raw/header.tmpl
footer = ''
changeset = raw/changeset.tmpl
difflineplus = '#line#'
difflineminus = '#line#'
difflineat = '#line#'
diffline = '#line#'
changesetparent = '# Parent #node#'
changesetchild = '# Child #node#'
filenodelink = ''
filerevision = '#rawfileheader##raw#'
fileline = '#line#'
diffblock = '#lines#'
filediff = raw/filediff.tmpl
fileannotate = raw/fileannotate.tmpl
annotateline = '#author#@#rev#: #line#'