Update link to PHP driver in SSL docs

This links to the MongoDB\Driver\Manager constructor, as is done in the Kerberos docs.

Author: jmikola

source/tutorial/configure-ssl-clients.txt

@@ -141,7 +141,7 @@ The MongoDB Drivers support encrypted communication. See:
 - `Java Driver <http://mongodb.github.io/mongo-java-driver/3.0/driver/reference/connecting/ssl/>`_
 - `Node.js Driver <http://mongodb.github.io/node-mongodb-native/2.0/tutorials/enterprise_features/>`_
 - `Perl Driver <https://metacpan.org/pod/MongoDB::MongoClient#ssl>`_
-- `PHP Driver <http://php.net/manual/en/mongo.connecting.ssl.php>`_
+- `PHP Driver <https://php.net/manual/en/mongodb-driver-manager.construct.php>`_
 - `Python Driver <http://api.mongodb.org/python/current/examples/tls.html>`_
 - `Ruby Driver <https://docs.mongodb.com/ecosystem/tutorial/ruby-driver-tutorial/#mongodb-x509-mechanism>`_
 - `Scala Driver <http://mongodb.github.io/mongo-scala-driver/1.1/reference/connecting/ssl/>`_