lxd/migrate: Updates migrationSourceWs to use util.ExtractTCPConn and util.SetTCPTimeouts
lxd/migrate: Updates migrationSourceWs to use util.ExtractTCPConn and util.SetTCPTimeouts

To enable TCP timeouts on the connections to avoid hangs during network issues.

Signed-off-by: Thomas Parrott <6b778ce645fb0e3dde76d79eccad490955b1ae74@canonical.com>

hallyn/lxd,hallyn/lxd,stgraber/lxd,lxc/lxd,hallyn/lxd,hallyn/lxd,lxc/lxd,hallyn/lxd,lxc/lxd,lxc/lxd,stgraber/lxd,stgraber/lxd,stgraber/lxd,hallyn/lxd,lxc/lxd,stgraber/lxd,stgraber/lxd,lxc/lxd,lxc/lxd,stgraber/lxd