MFC	r271787:

simple_httpd: cosmetic cleanups.

Many tab vs space cleanups.
Use setpgid() instead of setpgrp() which is more portable.
MFC	r271789:

lpr: replace setpgrp(2) with setpgid(2).

setpgid(2) is more portable than setpgrp(2).
The BSD variant of setpgrp is a wrapper for
setpgid(2) anyways.