tree efc010cc2f8208657071dcedc59304cb15a843eb
parent 57c08cdb399bc2f44a516c08242731627958de83
author James Ring <sjr@jdns.org> 1423100262 -0800
committer James Ring <sjr@jdns.org> 1423100321 -0800

veyron/tools/findunusedport: move find port logic to common lib

This CL moves findunusedport logic to a common location inside
veyron/lib/testutil. It also changes the port-finding logic to use
bind(port=0) and a subsequent call to getsockname to find an unused
port.

Tested by hand.

Change-Id: I7ea13e23e47038d9b43db60c6a1a74371ae8ce0a