Reduced IdentityCheck timeout to 30 seconds, as per RFC 1413 minimum.

Submitted by: Ken Coar, PR #190
Reviewed by: Chuck Murcko, Roy Fielding


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@77712 13f79535-47bb-0310-9956-ffa450edef68