- Use real URL, not some inventive lies

- update to version 2.5
* abstract layer now handles auxiliary classes
* pwdLAstSet in AD is valid for 0 and -1 (thanks Taylor)
* fixed extend.novell.get_universal_password (thanks Fernando)
* entryUUID is properly validated in search filters (thanks FriedrichI)
* custom attribute formatters are properly applied when parsing the search filter
* REUSABLE strategy now honours credentials when changed in the original connection (thanks Prof Hase)
* add operation doesn't change passed attribute dict anymore (thanks Daniele)
* missing entry's attribute return False when searching instead of raising an exception (thanks Maxsond)
* fixed ad_timestamp evaluation for integers (thanks Flynn)
* wrong exception raised when user name is empty in simple binding (thanks Ivan)
* exception is raised if size limit is exceed when searchin in mocking strategies with raise_exceptions=True (thanks David)
* fixed validator for novell guid
* fixed validator for openldap EntryUUID
* fixed validator for AD objectGUID, now follows MS-DTYP
* fixed formatter for AD objectGUID
* fixed exception when adding binary values (thanks guidow)
* added escape_rdn_chars() to ldap3.utils.dn for safe checking untrusted input while building DNs (thanks Alex)
* fixed search for binary values in mock strategies
* fixed exception with unicode chars in subfilters for python 2 (thanks Friedrich)
* connection.extend.paged_search() doens't miss the last entries anymore when size limit is exceeded for the search on the server (thanks Friedrich)
* validators are not applied when loading data from json dump in Mock strategies (thanks Derek)
* additional validator to check for erroneous bytes to string conversion in Python 3 (thanks Brian)
* additional formatter and validator to check for generalizedtime with 0 year (thanks Brian)
* added ADDITIONAL_CLIENT_ENCODINGS parameter
* fixed AD dir_sync extended operation (thanks Lucas)
* ad_unlock_account works properly (thanks Francowxu)
* added Microsoft security descriptor control (thanks Dirk-jan)