Don't install LDAP handler, helper and example configuration file.

The handler has been heavily broken for a while.
It clearly lacks a maintainer.

examples/Makefile.am

 
-EXAMPLES = example.dup example.ldap example.maildir example.makecd example.mysql \
+EXAMPLES = example.dup example.maildir example.makecd example.mysql \
 		example.pgsql example.rdiff example.rsync example.sh  \
 		example.svn example.sys example.trac
 

handlers/Makefile.am

 
-HANDLERS = dup dup.helper ldap ldap.helper maildir makecd		\
+HANDLERS = dup dup.helper maildir makecd		\
          makecd.helper mysql mysql.helper pgsql pgsql.helper rdiff	\
          rdiff.helper rsync sh svn sys sys.helper trac tar tar.helper