Fix a copy/paste error in svnpubsub init script.

* tools/server-side/svnpubsub/rc.d/svnpubsub.freebsd: s/svnwcsub/svnpubsub/


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1584177 13f79535-47bb-0310-9956-ffa450edef68