C portability between non-UNIX operating systems.

[Martin Minow]

Rick Westerman asks for guidelines for porting code between
various C implementations -- especially those on non-Unix
machines.  There are some suggestions in the Decus C documentation.
They all boil down to

		D O N ' T   B E   C L E V E R .

I.e, don't assume that free()/realloc() sequences do what they
did on Unix V6.  Don't assume that variable-names are significant
past the 6th byte, etc. etc. etc.