Revert 1068310 as vetoed by Roy:

This requirement will
be (or has already been) removed from httpbis because it hinders
extensibility and breaks content management systems, just as the
change below causes content-language to be broken.  That is why
we never implemented this requirement when it was added (without
consensus) to RFC 2616.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@1068793 13f79535-47bb-0310-9956-ffa450edef68