Add alt code for 1993/lmfjyh

Why? Because! :-)

Updated .gitignore.

Added the entry to bugs.md.

Slightly modified the note in the Makefile so that the make all rule
refers to make alt.

The README.md file was updated including succinctly giving the gist
(that might or might not be redundant :-) ) of the entry i.e. how it
worked (though the author also stated this).

1993/lmfjyh/Makefile

@@ -111,8 +111,8 @@ OBJ= ${PROG}.o
 DATA=
 TARGET= ${PROG}
 #
-ALT_OBJ=
-ALT_TARGET=
+ALT_OBJ= ${PROG}.alt.o
+ALT_TARGET= ${PROG}.alt
 
 
 #################
@@ -129,7 +129,8 @@ all: data ${TARGET}
 ${PROG}: ${PROG}.c
 	@echo "NOTE: This will not compile when using modern compilers because"
 	@echo "it relies on a compiler bug which was fixed in gcc 2.3.3 (a very"
-	@echo "long time ago now)."
+	@echo "long time ago now). Try make alt for a version that works with gcc"
+	@echo ">=2.3.3."
 	${RM} -f \"\;main\(\)\{puts\(\"Hello\ World!\"\)\;\}char\*C=\".c
 	${CP} lmfjyh.c \"\;main\(\)\{puts\(\"Hello\ World!\"\)\;\}char\*C=\".c
 	${CC} ${CFLAGS} \