4.4BSD snapshot (revision 8.1); add 1993 to copyright

new copyright; att/bsd/shared

from John Gilmore for gcc

port to tahoe by Nir peleg of CCI

Add copyright

changed handling of the process not starting up so that
when "run < abc" is given where "abc" doesn't exist the right thing happens

put in cache initialization in at beginning of process startup
("initstart") ... the cache was non-empty after a "pi" which meant
instruction reads were getting the wrong values

centralized the printing of a source line number and file
to a routine called "printwhere" in pstatus.c ... other routines
were modified to use this routine

SIGILL has got to be traced for catching breakpoints,
it seems I forgot this in my old age.

slight change in the way signals are handled -- px now gets
all but interrupt, trap, and iot, it is assumed px handles the errors
and then sends itself a trap

removed all argument handling, stuff in runcont is used;
modified handling of px exit conditions in the case of the implicit "-t"
option which is set when running under "pix" or "obj"

date and time created 82/01/18 19:20:54 by linton