Major changes to support multiple distfiles in templates.

Each template now needs to use $distfiles that accepts the full
URL to download the distfile and old $extract_sufx is now merged
on it, but this must be separated by the '@' character. Example:

distfiles="http://www.foo.org/blah-6.2@.tar.gz
http://www.foo.org/blob-1.0@.tar.bz2"

If distfiles contains multiple files defined, $wrksrc is now
mandatory.

--HG--
extra : convert_revision : 1c3fa35f148af8323ce3cbcf5732104960de6bc4

templates/libtool.tmpl

@@ -2,9 +2,9 @@
 pkgname=libtool
 version=2.2.6a
 wrksrc="$pkgname-2.2.6"
-extract_sufx=".tar.gz"
 patch_files="libtool-fix-ltmain.sh.diff"
-url=http://ftp.gnu.org/pub/gnu/libtool
+distfiles="
+http://ftp.gnu.org/pub/gnu/libtool/$pkgname-$version@.tar.gz"
 build_style=gnu_configure
 short_desc="Generic library support"
 maintainer="Juan RP <xtraeme@gmail.com>"