username_regex acl

Hi
        Before I reinvent the wheel, does any body have a username_regex acl
patch. Something along the lines of:

acl specific_pages url_regex ^http://a.server.com/path
acl any_auth_user proxy_auth REQUIRED
acl just_this_user_class username_regex ^zz

http_access allow specific_pages any_auth_user just_this_user_class

We have a large user base consisting of ~30k students, ~6K staff and ~10k
externals. The username are related to their class; students start with a 's',
externals with a 'zz' and so on. Rather than doing a

acl just_these_auth_user proxy_auth "/path/to/a_very_long_list_of_users"

a regex on proxy_auth username should be much more effiecent. It could also
work on ident lookups aswell.

acl specific_pages url_regex ^http://a.server.com/path
acl any_ident_user ident REQUIRED
acl just_this_user_class username_regex ^zz

http_access allow specific_pages any_ident_user just_this_user_class

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