[patch] MDK 1.1: small configure help texts adjustments

The patch below adjusts some configure help entries according to their
default values (if the default is "true", the interesting option is the 
--without-foo option).

Please apply
Adrian

--- configure.in.old	2004-06-14 01:56:29 +0200
+++ configure.in	2004-06-14 01:58:16 +0200
@@ -35,7 +35,7 @@
 
 dnl Check for readline and history
 AC_ARG_WITH(readline,
-[  --with-readline         build mixvm with readline support],
+[  --without-readline      build mixvm without readline support],
 [case "${withval}" in
   yes) readl=true ;;
   no)  readl=false ;;
@@ -62,7 +62,7 @@
 
 dnl Check for guile
 AC_ARG_WITH(guile,
-[  --with-guile         build MDK with Guile support],
+[  --without-guile      build MDK with Guile support],
 [case "${withval}" in
   yes) wguile=true ;;
   no)  wguile=false ;;
@@ -97,7 +97,7 @@
 
 dnl Check if the gtk gui is required
 AC_ARG_ENABLE(gui,
-[  --enable-gui          build the GTK+ GUI for mixvm (gmixvm)],
+[  --disable-gui         do not build the GTK+ GUI for mixvm (gmixvm)],
 [case "${enableval}" in
   yes) gui=true ;;
   no)  gui=false ;;