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/openssl.tmpl

@@ -1,7 +1,7 @@
 # Template file for 'openssl'
 pkgname=openssl
 version=0.9.8i
-distfiles="http://www.openssl.org/source/$pkgname-$version@.tar.gz"
+distfiles="http://www.openssl.org/source/$pkgname-$version.tar.gz"
 build_style=configure
 configure_script="./Configure"
 configure_args="--prefix=/usr