syslog: Add v5 ldap support, remove obsolete default

files/syslog/etc/rsyslog.d/50-ldap-v5.conf

+# Move the ldap logging into its own file and don't log to messages
+#
+local4.debug  -/var/log/ldap;FileFormat
+

files/syslog/etc/rsyslog.d/90-local-default.conf

-# 90-local.conf - Write syslog messages to the normal places locally
-
-*.emerg         *
-*.debug         /var/log/messages
-*.err           /dev/console