* ext/iconv/iconv.c: add attention for machine independent.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@19294 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,7 @@
+Thu Sep 11 19:09:25 2008  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* ext/iconv/iconv.c: add attention for machine independent.
+
 Thu Sep 11 15:23:26 2008  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* bignum.c (bigdivrem): adjust length for division and remainder.

ext/iconv/iconv.c

@@ -66,6 +66,12 @@
  * 4. Shorthand for (3).
  *
  *      Iconv.iconv(to, from, *input.to_a)
+ *
+ * == Attentions
+ *
+ * Even if some extentions of implementation dependent are useful,
+ * DON'T USE those extentions in libraries and scripts to widely distribute.
+ * If you want to use those feature, use String#encode.
  */
 
 /* Invalid value for iconv_t is -1 but 0 for VALUE, I hope VALUE is