Add functionality making the plugin compatible with multi-domain
features of ManifoldCF. Specifically, allow multiple domain/username
tuples to be passed in the request.
(Karl Wright)
CONNECTORS-485: Port to the latest 4.x code.
(Karl Wright)
CONNECTORS-354: Add a parameter to allow the maximum connection pool
size to be configurated in solrconfig.xml.
(Karl Wright)
CONNECTORS-333: Use multithreaded connection manager and tcp-no-delay
in order to avoid sockets accumulating in CLOSE_WAIT.
(Simon Willnauer via Karl Wright)