Disable readline recognition for now, as our readline is much too old

for it to make sense.

lang/ruby/patches/patch-ext_readline_extconf_rb

@@ -0,0 +1,12 @@
+$OpenBSD: patch-ext_readline_extconf_rb,v 1.1 2001/02/21 16:51:45 espie Exp $
+--- ext/readline/extconf.rb.orig	Wed Feb 21 17:50:12 2001
++++ ext/readline/extconf.rb	Wed Feb 21 17:50:18 2001
+@@ -8,6 +8,7 @@ have_library("ncurses", "tgetnum") or
+ 
+ if have_header("readline/readline.h") and
+     have_header("readline/history.h") and
+-    have_library("readline", "readline")
++    have_library("readline", "readline") and
++    false
+   create_makefile("readline")
+ end