Merge r653856 and r655438 from trunk:

note that KeepAliveTimeout of the first defined virtual host 
in the set of NameVirtualHost will be used

PR: 36770

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@655477 13f79535-47bb-0310-9956-ffa450edef68