Make ssl/socket acceptance have timeouts

[jordansissel]

We shouldn't allow a misbehaving client to hinder acceptance of new ssl connections. Reported in elastic/logstash-forwarder#429 is an issue (I think?) that relates to a bad/stalled client disappearing in the middle of of a handshake or is unable to complete it successfully - can cause the whole acceptor thread to stall, possibly forever.

[dhawes]

I ran across this today. A simple telnet can ruin your day.

Has any progress been made on this? I still notice this issue in logstash-5.0.0-alpha3.

[jordansissel]

@ph let's make sure the new beats input library doesn't suffer from this kind of fault (slow/stalled client handshake causing problems for other client handshakes)

[ph]

thanks @jordansissel I will check to address this too.