Merge r641855 from trunk:

Update Timeout section, the semantics changed completely
since 1.3 and the caveats on signals not being reset
thankfully no longer apply either.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@787961 13f79535-47bb-0310-9956-ffa450edef68