rb: NonblockingServer: Use a select() loop in the acceptor thread

Using a select() loop with a timeout allows the acceptor thread to be shut down
cleanly under JRuby.


git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@669042 13f79535-47bb-0310-9956-ffa450edef68
6 files changed