Following up on r1805461, fix the actual executable name for SHA256SUM
in the dist.sh script.

* dist.sh: Invoke SHA256SUM=`sha256sum` rather than `sha1sum`.


git-svn-id: https://svn.apache.org/repos/asf/serf/trunk@1910054 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/dist.sh b/dist.sh
index 51e7491..51267f9 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 "$SHA256SUM" ] || SHA256SUM=sha1sum
+[ -n "$SHA256SUM" ] || SHA256SUM=sha256sum
 
 echo ""
 echo "Done:"