TraceEnable off causes the core server and mod_proxy to return a 405 (Method not allowed) error to the client.

http://superuser.com/questions/655446/apache-2-0-disabling-the-http-trace-and-track-methods
http://httpd.apache.org/docs/current/mod/core.html#traceenable
http://security.stackexchange.com/questions/20688/nginx-http-trace (nothing to do fox NGiNX)
By default, don't check certificate for LDAP access from Apache.
If host -TtA 'hostname -s' doesn't work (not found: 3(NXDOMAIN)), then take 'hostname'.
Add test programme to check fqn: sbin/usrcmd/get_fqn_test
Apache: LogLevel authnz_ldap:info for http_git.