Log Message:
Address PR pkg/24607 by Georg Schwarz to make this build and install under
IRIX:
- add flexibility to PLIST
- add configure arguments to point to openssl if not builtin
- don't use '-print0' to find(1).  IRIX' find does not have this capability,
  and since we know for a fact that it will not be needed, we can leave it
  out in this case.