3.9.8.3.

git-svn-id: https://plugins.svn.wordpress.org/spam-hammer/trunk@1055428 b8457f37-d9ea-0310-8a92-e5e31aec5664
Readme fix.

git-svn-id: https://plugins.svn.wordpress.org/spam-hammer/trunk@1055429 b8457f37-d9ea-0310-8a92-e5e31aec5664