Support for ScriptAliasMatch

[antaflos]

Much like #479 there is a need to support ScriptAliasMatch in addition to simple ScriptAlias.

Example (quite complex):

# Make Gitolite (more specifically the suexec-wrapper) serve
# everything that the git-http-backend can handle and leave the
# rest to Gitweb.
ScriptAliasMatch \
    "(?x)^/git/(.*/(HEAD | \
    info/refs | \
    objects/(info/[^/]+ | \
    [0-9a-f]{2}/[0-9a-f]{38} | \
    pack/pack-[0-9a-f]{40}\.(pack|idx)) | \
    git-(upload|receive)-pack))$" \
    /var/www/bin/gitolite-suexec-wrapper.sh/$1

ScriptAlias /git /var/www/gitweb/index.cgi

[igalic]

👍 fixed with #502