thunderbird: fixed build configuration (provided by Aldas ;)

mail/thunderbird/thunderbird.conf

@@ -2,7 +2,7 @@
 # This copyright note is auto-generated by ./scripts/Create-CopyPatch.
 #
 # Filename: package/.../thunderbird/thunderbird.conf
-# Copyright (C) 2007 The OpenSDE Project
+# Copyright (C) 2007 - 2010 The OpenSDE Project
 # Copyright (C) 2004 - 2006 The T2 SDE Project
 # Copyright (C) 1998 - 2004 Clifford Wolf
 #
@@ -21,7 +21,16 @@ fi
 
 thunderbird_config() {
 	cat >> .mozconfig <<-EOT
-. \$topsrcdir/mail/config/mozconfig
+export MOZ_PHOENIX=1
+mk_add_options MOZ_PHOENIX=1
+
+ac_add_options --enable-application=mail
+ac_add_options --enable-default-toolkit=cairo-gtk2
+ac_add_options --without-system-png
+ac_add_options --enable-extensions=default
+ac_add_options --disable-profilesharing
+ac_add_options --enable-official-branding
+ac_add_options --enable-static
 EOT
 }