Add 2006/monge/alt code + format/typo checks

The alt code allows one to reconfigure the dimensions and the number of
iterations, based on the author's remarks (three #defines at the top of
the file).

Format/typo check README.md file.

Update bugs.md about the entry. It not only requires rwx memory but also
x86/x86_64 machines (this was already noted). This was said to be worth
fixing if possible (though in some systems it's impossible) so I kept it
that way. I was going to suggest alt version instead but since it seemed
like a good idea to have an alt version I decided to make it so that it
might be good if they update both versions.

2006/monge/Makefile

@@ -42,7 +42,7 @@ CSILENCE= -Wno-bitwise-op-parentheses -Wno-conditional-type-mismatch \
 	-Wno-declaration-after-statement -Wno-dollar-in-identifier-extension \
 	-Wno-error -Wno-implicit-function-declaration \
 	-Wno-incompatible-pointer-types -Wno-int-conversion -Wno-parentheses \
-	-Wno-return-type -Wno-strict-prototypes
+	-Wno-return-type -Wno-strict-prototypes -Wno-implicit-int
 
 # Common C compiler warning flags
 #
@@ -119,8 +119,8 @@ OBJ= ${PROG}.o
 DATA=
 TARGET= ${PROG}
 #
-ALT_OBJ=
-ALT_TARGET=
+ALT_OBJ= ${PROG}.alt.o
+ALT_TARGET= ${PROG}.alt
 
 
 #################
@@ -143,6 +143,9 @@ ${PROG}: ${PROG}.c
 alt: data ${ALT_TARGET}
 	@${TRUE}
 
+${PROG}.alt: ${PROG}.alt.c
+	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
+
 # data files
 #
 data: ${DATA}