windows: Move TcpListener's family out of the lock
windows: Move TcpListener's family out of the lock

No need to get synchronized access to this, it never changes.

asomers/mio,fuchsia-mirror/third_party-mio,dwrensha/mio,mneumann/mio,carllerche/mio,mneumann/mio,carllerche/mio,fuchsia-mirror/third_party-mio,asomers/mio,murarth/mio