Log Message:
smake: Update to 1.3nb10

Changes from AN-2020-03-11:
-	configure: The autoconfiguration now has an enhanced test for waitid()
	that was needed since Mac OS is still not POSIX compliant and returns 0
	instead of the signal number for a process that has been killed by a
	signal. MacOS did pass the POSIX certification as a result of a missing
	test for that problem.

	Since every vertified OS needs to run an annual refresh the
	certification with recent versions of the test, I guess that
	Mac OS (Catalina updates) may become more compliant witin a year.

-	psmake: The portable bootstrap compile environment for smake missed
	a symlink for unsetenv.c to libschily since the related code has been
	moved to libschily in 2018. This prevented compilation on IRIX.

	Thanks to Kazuo Kuroi for reporting

Changes from AN-2020-03-27:

Changes from AN-2020-04-18:
-	Makefile system: the IRIX compiler driver RULES/cc-sgi.rul has been
	reduced to one single file and RULES/cc-sgi32.rul RULES/cc-sgi64.rul
	are now symlinks to the file RULES/cc-sgi.rul

-	Makefile system: IRIX now supports explicit 32 bit compilation targets
	using:

		smake CCOM=cc32

-	smake: A new option -a has been added. This option allows to tell
	smake not to set up the automake specific make macros MAKE_ARCH,
	MAKE_OS and similar. The identifying macro MAKE_NAME=smake is still
	set up in order to allow to select the right make specific include
	rules.

-	smake: the file archconf.c has been modified to use a simplified
	interface in order to be able to use mostly identical code in
	SunPro Make for ease of future maintenance.

Changes from AN-2020-05-11:
-	Makefile system: A new version of the BSD make (bmake) program fixed
	a bug in pattern macro substitution, so we are now able to detect
	BSD make and to read BSD make program specific rules.

	This could in theory allow us to support BSD make in the future,
	but...

	Note that we on the other side discovered a new bug with pattern
	macro substitution in bsd make: The substitution:

		$(FOO:%=bar/%)

	is replaced by "bar/" with an empty "FOO", but of course, \ 
with an
	empty FOO, the substitution should be empty as well.

	This second bug (above) was fixed on May 6th, but we do not yet have
	all needed make rules and we do not know whether other bugs may still
	prevent the usability of BSD make. Supporting BSD make will be hard
	as BSD make does not support pattern matching default rules and this
	is important for placing the .o files into a sub-directory.

	Also note that the portable program source for "bmake" from \ 
"pkgsrc"
	is 2 years old and thus currently cannot be supported at all. If
	you like to experiment on your own, you need to get this version:

		http://crufty.net/help/sjg/bmake.html

	see

		http://www.crufty.net/ftp/pub/sjg/bmake.tar.gz

	and replace the newer files from the netbsd.org CVS tree by hand in
	order to fix the first and second mentioned pattern macro substitution
	bug.

-	Makefile system: RULES/MKLINKS was enhanced to create a new symlink
	RULES/r-bsdmake.tag that points to RULES/r-make.tag

-	Makefile system: The archive makefiles.tar.bz2 has been added to the
	schilytools tree to allow easy reuse of the makefile system for own
	projects.