Implement ldap_modify_batch.
Merge branch 'pull-request/571' into PHP-5.4

* pull-request/571:
  Implement ldap_modify_batch.
Merge branch 'PHP-5.4' into PHP-5.5

* PHP-5.4:
  Implement ldap_modify_batch.

Conflicts:
	ext/ldap/ldap.c
Merge branch 'PHP-5.5' into PHP-5.6

* PHP-5.5:
  Implement ldap_modify_batch.
Merge branch 'PHP-5.6'

* PHP-5.6:
  Implement ldap_modify_batch.