Revert "Make redirect mode default"

This reverts commit 0b996721337a876fce5a24fafde5a313ac60941c.

After further investigation the TPROXY code in nogotofail is correct and
working. The test machine somehow got in a state where the ip address
returned by getsockname() was not that of the remote host. No idea how
that happened but doesn't seem to be a ngtf bug.