autofs.conf: set use_hostname_for_mounts

Set option to pass hostnames to the kernel mount instead of resolved ip
addresses. This also disables the attempt of automount to filter
and sort hosts by pinging them with own rpc calls. The problem with that
is, that this requires knowledge which needs to be maintained about the
evolving nfs protocols.

misc_etc_files/autofs.conf

@@ -164,7 +164,7 @@ browse_mode = no
 # 			If that behaviour is not wanted then set
 #			ths to "yes", default is "no".
 #
-#use_hostname_for_mounts = "no"
+use_hostname_for_mounts = "yes"
 #
 # disable_not_found_message - The original request to add this log message
 # 			 needed it to be unconditional. That produces, IMHO,