any more -- this drastically slows delivery because the next queue run
might be an hour away.
Pointed out by Takahiro Yugawa PR bin/21018
He suggested changing to -odi, but I've changed to -odb (background
delivery) instead.
I've left an #ifdef QUEUE_ONLY for those who would like to build the
old way, but I'm not expecting any. I've also heavily commented this
line of code to explain the issues to anyone reading it later on.
I would have made this a run time command line flag, but it isn't like
you can change rmail's arguments given the uucp architecture, and
besides, UUCP is mostly dead...
626a48a033