(create_process): #if 0 out the code which sets the child's
handler for SIGCHLD to sigchld; the code which gives sigchld its
value has been diked out under these CPP symbols, so this should
be diked out too.
system doesn't have that facility.
* process.c: [USG5] Don't include <fcntl.h>.
[USG] Don't bother including termios, termio, or fcntl; systerm.h
takes care of all that.
Remove the "mis;tak-+;;" line from the code; apparently this
section of code does get used.
* process.c (wait_reading_process_input): Put comments around
text following #endif.