enable ctype functions by default

ext/ctype/config.m4

@@ -2,14 +2,10 @@ dnl
 dnl $Id$
 dnl
 
-PHP_ARG_ENABLE(ctype, whether to enable ctype support,
-[  --enable-ctype          Enable ctype support])
+PHP_ARG_ENABLE(ctype, whether to enable ctype functions,
+[  --disable-ctype         Disable ctype functions], yes)
 
 if test "$PHP_CTYPE" != "no"; then
-  dnl If you will not be testing anything external, like existence of
-  dnl headers, libraries or functions in them, just uncomment the 
-  dnl following line and you are ready to go.
   AC_DEFINE(HAVE_CTYPE, 1, [ ])
-  dnl Write more examples of tests here...
   PHP_EXTENSION(ctype, $ext_shared)
 fi