Added a <LimitExcept method ...> sectioning directive that allows

Added a <LimitExcept method ...> sectioning directive that allows
the user to assign authentication control to any HTTP method that
is *not* given in the argument list; i.e., the logical negation
of the <Limit> directive.  This is particularly useful for controlling
access on methods unknown to the Apache core, but perhaps known by
some module or CGI script.

Submitted by:	 Roy Fielding and Tony Finch <dot@dotat.at>

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@82783 13f79535-47bb-0310-9956-ffa450edef68