glibc: reintroduced handling of internal libidn support (see note!)

Note:

This partially reverts commit cde2856ca0
because I wrongly assumed that the IDN support will be enabled by default,
which is not the case! As of glibc 2.11 only the sources of the glibc
libidn addon are included, but the addon itself is *NOT* enabled by
default. Thus I restored the old behavior besides the part for unpacking
the libidn addon sources.

base/glibc/glibc.conf

@@ -81,6 +81,11 @@ else
 		var_append extraconfopt " " "--without-tls"
 fi
 
+# ckeck whether to enable libidn support
+if [ $SDECFG_PKG_GLIBC_LIBIDN = 1 ]; then
+	var_append glibc_addons "," "libidn"
+fi
+
 var_append extraconfopt " " "--enable-add-ons=$glibc_addons"
 
 # control whether to include profiling support

base/glibc/subconfig-libc.in

@@ -2,7 +2,7 @@
 # This copyright note is auto-generated by ./scripts/Create-CopyPatch.
 #
 # Filename: package/.../glibc/subconfig-libc.in
-# Copyright (C) 2007 - 2010 The OpenSDE Project
+# Copyright (C) 2007 - 2011 The OpenSDE Project
 # Copyright (C) 2004 - 2006 The T2 SDE Project
 # Copyright (C) 1998 - 2003 Clifford Wolf
 #
@@ -23,6 +23,7 @@ comment 'Glibc (GNU C Library) Options'
     esac
 
     bool 'Enable TLS and NPTL' SDECFG_PKG_GLIBC_TLS $tls
+    bool 'Enable LibIDN' SDECFG_PKG_GLIBC_LIBIDN 1
     bool 'Enable profile library' SDECFG_PKG_GLIBC_ENABLE_PROFILE 0
 
 comment ' '