Extensive performance improvements. Cleaned up inefficient use of

auto initializers, multiple is_matchexp calls on a static string,
and excessive merging of response_code_strings[].

Submitted by: Dean Gaudet
Reviewed by: Randy Terbush, Chuck Murcko, Roy Fielding


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@77595 13f79535-47bb-0310-9956-ffa450edef68