Try to fix #4754 LDAP CN escape. Please test.

Thanks to xet7 !

packages/wekan-ldap/server/ldap.js

@@ -1,4 +1,5 @@
 import ldapjs from 'ldapjs';
+import escapedToHex from 'ldapjs';
 import util from 'util';
 import Bunyan from 'bunyan';
 import {log_debug, log_info, log_warn, log_error} from './logger';