When the "replication" option is specified and evaluates to true, the array of
connection parameters passed to the client constructor os be used to initialize
a new instance of Predis\Network\IConnectionReplication. This option can also
accept a callable object used as an initializer or the fully-qualified name of
a class.
This is a starting point to add a documentation of the whole set of APIs and
classes of Predis. The next step will be to actually improve and extend it.