cleanup.

- remove superfluid #include
- remove no longer neccessary bitmask handling
- be more efficient if there are no groups for the user
- call ap_note_auth_failure instead of ap_note_basic_auth_failure


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@98178 13f79535-47bb-0310-9956-ffa450edef68