[krbdev.mit.edu #1364] make depend requires use of Gnu sed under Irix

[Ken Raeburn via RT]

Interesting...  it looks like IRIX sed doesn't treat the "p" command the
same way as GNU sed does.  Under GNU sed, "p" prints out the current
pattern space, then you can go on and do other stuff, including printing
more things.  But IRIX sed appears to be printing only the last thing
specified for the "p" command.  If I add a "q" command in the middle of
the script, I get only the fragment most recently printed before the
script quits.

Solaris and, as far as I can tell, the IRIX sed(1) man page, seem to
agree with the GNU sed behavior.