Fix MongoCollection::getIndexInfo() return and example docs

https://jira.mongodb.org/browse/PHP-670


git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@329340 c90b9560-bf6c-de11-be94-00142212c4b1
Document non-boolean return values for MongoCollection::ensureIndex()

https://jira.mongodb.org/browse/PHP-671


git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@329341 c90b9560-bf6c-de11-be94-00142212c4b1
Fix terms in MongoCollection::ensureIndex() return doc


git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@329342 c90b9560-bf6c-de11-be94-00142212c4b1