two performance improvements:

- switch from using r->notes to r->request_config
- avoid a strcmp() when checking if val eq '!'

PR:
Obtained from:
Submitted by:
Reviewed by:


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@92120 13f79535-47bb-0310-9956-ffa450edef68