[sudo] Improved to enable LDAP support if openldap is available

Note: For more information take a look at http://sudo.ws/sudo/readme_ldap.html

base/sudo/sudo.conf

@@ -19,3 +19,9 @@ extraconfopt="--enable-log-host --with-tty-tickets"
 if ! pkginstalled pam; then
 	var_append extraconfopt ' ' '--without-pam'
 fi
+
+# LDAP support
+if pkginstalled openldap ; then
+	pkgprefix -t openldap
+	var_append extraconfopt ' ' "--with-ldap=$root/$( pkgprefix openldap )"
+fi