We could easily retire etherip. It has never been enabled (worse: the
option was not even present and commented out before I added it a few
months ago), the code is shitty, buggy (eg watch the man page) and not
MP-safe.
Above all, the EtherIP spec (RFC3378) actually recommends dropping
EtherIP and using L2TP instead. We do have L2TP -- written by the
Japanese guys, so it works, it's MP-safe and everything.
Basically people should use L2TP, and I don't see many reasons for
keeping etherip, especially if it's low quality code. Retiring it would
also prune one "unprotected" entry from the TODO.smpnet list.