Switch to SHA-512 checksums in the dist.sh script, to be in line with
what we currently publish alongside the tarballs.

* dist.sh: Use `sha512sum` instead of `sha256sum`.


git-svn-id: https://svn.apache.org/repos/asf/serf/trunk@1910055 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/dist.sh b/dist.sh
index 51267f9..07535b5 100755
--- a/dist.sh
+++ b/dist.sh
@@ -90,7 +90,7 @@
 # allow checksum tool names to be overridden
 [ -n "$MD5SUM" ] || MD5SUM=md5sum
 [ -n "$SHA1SUM" ] || SHA1SUM=sha1sum
-[ -n "$SHA256SUM" ] || SHA256SUM=sha256sum
+[ -n "$SHA512SUM" ] || SHA512SUM=sha512sum
 
 echo ""
 echo "Done:"
@@ -131,6 +131,6 @@
 echo "sha1sums:"
 $SHA1SUM "${release}.tar.bz2" "${release}.zip"
 echo ""
-echo "sha256sums:"
-$SHA256SUM "${release}.tar.bz2" "${release}.zip"
+echo "sha512sums:"
+$SHA512SUM "${release}.tar.bz2" "${release}.zip"
 echo ""