#!/bin/sed -rf
/^#\tldap/ {
	s/^#\tldap$/\tldap/
}

/Auth-Type LDAP/ {
	N
	N
	s/^#?(\s*)Auth-Type LDAP \{\
#?(\s*)ldap\
#?(\s*)\}/\1Auth-Type LDAP \{\
\2ldap\
\3\}/
}