vms argv[0] and exit status fixes.

[John E. Malmberg]

* main.c, vms_main_wrapper.c (main): This fixes the VMS arvg[0] to be 
the normalized program name expected by users and test scripts.  This 
handles the three possible syntax's that the argv[0] can be set to from 
DCL, and handled removing a facility prefix.

When make is exec() from a C program, the argv[0] set by the exec() is 
also preserved as expected.

The older VMS specific code that did not handle all these cases has been 
removed.

Unneeded VMS specific code for tempfile processing removed.  The VMS 
CRTL maps /tmp to SYS$SCRATCH: if TMP: does not exist.

* makeint.h: Properly encode the Unix status as a VMS status code while 
setting the VMS severity and message inhibit bits.  This allows programs 
written in C to see the documented and expected exit code, and sets the 
severity level for native VMS programs to use.

This fix also inhibits the incorrect display of additional error 
messages after the program has exited.

Regards,
-John

0001-VMS-argv-0-and-exit-status-fix.patch.gz
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