portmap's main process can be tame "stdio rpath inet proc"; proc is

portmap's main process can be tame "stdio rpath inet proc"; proc is
for the callit interface needing to fork, and parent needing to wait.
that child can drop to "stdio rpath inet".

It is possible some libc/rpc codepath has not yet been figured out, but
commiting it is the best way to get it tested. Tested what I could myself,
but noone answered my call for testing...