Use bash features to improve $distfiles parsing.

That means that it's not necessary anymore to use an '@' before the
extract suffix string. yay.

--HG--
extra : convert_revision : 83ce2c783cb917ef59b87eacb0565cfcff277218

templates/initramfs-tools.tmpl

@@ -3,7 +3,7 @@ pkgname=initramfs-tools
 version=0.92l
 wrksrc=$pkgname
 distfiles="
-http://ftp.de.debian.org/debian/pool/main/i/$pkgname/${pkgname}_${version}@.tar.gz"
+http://ftp.de.debian.org/debian/pool/main/i/$pkgname/${pkgname}_${version}.tar.gz"
 build_style=custom-install
 short_desc="Tools for generating an initramfs"
 maintainer="Juan RP <xtraeme@gmail.com>"