Fixed PHP-836: Fix more for-type tests after finding with hash_find.
Merged pull request #456
Merged Pull Request #457

* pull-request/457:
  Fixed PHP-829: Segfault when a Replicaset doesn't have a passive server
Changed db to zdb.
Fixed PHP-814: Passing in invalid MongoDB to MongoDBRef::get() segfaults.
Merged pull request #461
Fixed PHP-747: Improve numeric check for write concern option.
Fixed test for < PHP 5.2.
Merged pull request #463
Fixed PHP-839: Add config-w32.h to and remove config.h from package.xml.
Merged pull request #458