pTools Process Execution Modification Utility (pstop)

Based off the Sun Microsystems pstop utility.  Stops each process 
specified on the command line.

Usage:
	pstop { pid } ...

NOTES:
	- Solaris accomplishes this through the use of the /proc/pid/ctl
	file.
	* Our implementation will initially use the kill() system call to
	send a SIGSTOP, which cannot be caught or ignored.

	- Revision 2.1 now uses the /proc/<pid>/ctl file method of 
	stopping the process.

