2001/herrmann2 requires 32-bit to work completely

By instinct I suspected that the reason it did not work fully (some
invocations do work) is that it's being compiled as 64-bit. This proved
to be the case: 32-bit works in full. Thus make alt now compiles it as
64-bit and the default compiles it as 32-bit.

To prevent making the Makefile more complicated for the default (not the
alt) target we add -m32 and the alt does not do anything special.

Updated bugs.md as the bug status and other information about it has
obviously changed. Same with README.md.

Updated .gitignore.

2001/herrmann2/Makefile

@@ -114,8 +114,8 @@ OBJ= ${PROG}.o
 DATA= herrmann2.cup herrmann2.ioccc
 TARGET= ${PROG}
 #
-ALT_OBJ=
-ALT_TARGET=
+ALT_OBJ= ${PROG}.alt.o
+ALT_TARGET= ${PROG}.alt
 
 
 #################
@@ -130,13 +130,16 @@ all: data ${TARGET}
 	supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
-	${CC} ${CFLAGS} $< -o $@ ${LIBS}
+	${CC} ${CFLAGS} -m32 $< -o $@ ${LIBS}
 
 # alternative executable
 #
 alt: data ${ALT_TARGET}
 	@${TRUE}
 
+${ALT_TARGET}: herrmann2.c
+	${CC} ${CFLAGS} $< -o $@ ${LIBS}
+
 # data files
 #
 data: ${DATA}