Include MONGODB-X509 in auth mechanism error message
Merge pull request #650
PHP-1044: Segfault with connection URI using SASL authentication
Merge pull request #651 from bjori/PHP-1044-segfault-when-authdb-is-not-set

PHP-1044: Segfault with connection URI using SASL authentication

* bjori/PHP-1044-segfault-when-authdb-is-not-set:
  PHP-1044: Segfault with connection URI using SASL authentication
Unused variable
Merge pull request #649 from bjori/unused-var

Unused variable

* bjori/unused-var:
  Unused variable
Add --with-mongo-sasl to rebuild.sh configure params
Merge pull request #652
Fix grammar in auth mechanism error messages
Merge pull request #653