Followup to r26503:  svnserve fix suggested by Hyrum.
Followup to r26503:  svnserve fix suggested by Hyrum.

* subversion/svnserve/serve.c
  (update):  parse 'B', not 'b', for new boolean parameter.

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