For issue #2872, log (at APLOG_WARNING) invalid svn:mime-type properties being attempted to be set.  Do not add comparable logging to the other instance of svn:mime-type validation --- in set_headers(), where those are validated for inclusion in headers.
For issue #2872, log (at APLOG_WARNING) invalid svn:mime-type properties being
attempted to be set.  Do not add comparable logging to the other instance of
svn:mime-type validation --- in set_headers(), where those are validated for
inclusion in headers.

* subversion/mod_dav_svn/liveprops.c
  (insert_prop_internal):
    Log the error from svn_mime_type_validate() at APLOG_WARNING.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion