Claim some work, and remove obsolete references to svn_fs_attach_lock().
Claim some work, and remove obsolete references to svn_fs_attach_lock().

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion