remote machines. Now they really are handled *exactly* the same as
input filters (if=) for remote queues, except that they are started
with a different set of parameters. This should fix a few subtle
bugs in output-filter processing on such queues. It is a pretty
significant re-arranging of sendfile(), moving some of it to a new
execfilter() routine.
PR: 36552
Reviewed by: no screams from freebsd-audit
MFC after: 12 days