Check for max window length at start up to ensure socket buffers have sufficient capacity

[mjpt777]

1 observations from 2017-10-21 18:49:33.373+0100 to 2017-10-21 18:49:33.373+0100 for:
 io.aeron.driver.exceptions.ConfigurationException: Max Window length greater than socket SO_RCVBUF, increase 'aeron.rcv.initial.window.length' to match window: windowMaxLength=2097152, SO_RCVBUF=212992
	at io.aeron.driver.media.ReceiveChannelEndpoint.validateSenderMtuLength(ReceiveChannelEndpoint.java:236)
	at io.aeron.driver.DriverConductor.onCreatePublicationImage(DriverConductor.java:180)
	at io.aeron.driver.cmd.CreatePublicationImageCmd.execute(CreatePublicationImageCmd.java:62)
	at io.aeron.driver.DriverConductor.accept(DriverConductor.java:134)
	at io.aeron.driver.DriverConductor.accept(DriverConductor.java:53)
	at org.agrona.concurrent.OneToOneConcurrentArrayQueue.drain(OneToOneConcurrentArrayQueue.java:111)
	at io.aeron.driver.DriverConductor.doWork(DriverConductor.java:142)
	at org.agrona.concurrent.AgentRunner.doDutyCycle(AgentRunner.java:220)
	at org.agrona.concurrent.AgentRunner.run(AgentRunner.java:159)
	at java.lang.Thread.run(Thread.java:748)