Change how 1985/sicherman alt code is managed

Removed the original sicherman.alt.c (which was the original code that
requires -traditional-cpp or an older compiler) and make
sicherman.alt2.c it instead which is a slight modification of
sicherman.c: it has two args to main() in case some compilers (like
clang) eventually object to having one arg (like it does for 4 args and
claims it does for 1 even though it does not). Since the sicherman.alt.c
is built automatically if compilation fails in the sicherman rule it
will compile to sicherman. However if it is built manually like 'make
alt' then it's built as sicherman.alt. This makes it easier to use but
also allows one to build the alt version should they wish and not have
it overwrite sicherman.

The try.alt.sh script was added in the case of manual compilation of
sicherman.alt.c.

1985/sicherman/Makefile

@@ -132,18 +132,15 @@ all: data ${TARGET}
 	clean clobber install love haste waste maker easter_egg \
 	sandwich supernova deep_magic magic charon pluto
 
-${PROG}: ${PROG}.c ${PROG}.alt2.c
+${PROG}: ${PROG}.c ${PROG}.alt.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS} || \
-	    ${CC} ${CFLAGS} ${PROG}.alt2.c -o $@ ${LDFLAGS}
+	    ${CC} ${CFLAGS} ${PROG}.alt.c -o $@ ${LDFLAGS}
 
 # alternative executable
 #
 alt: data ${ALT_TARGET}
 	@${TRUE}
 
-${PROG}.alt: ${PROG}.alt.c
-	${CC} ${CFLAGS} -traditional-cpp $< -o $@ ${LDFLAGS}
-
 # data files
 #
 data: ${DATA}