Forward-port from mod_dav 1.0:

* modules/dav/main/util.c (dav_validate_resource_state): Fix a 2617
violation: if the lock user validation fails, rather than giving a 401
without a WWW-Authenticate header, give a 403.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@102958 13f79535-47bb-0310-9956-ffa450edef68