* Since the CGI had to drop the wiki lock to avoid deadlocking the

* Since the CGI had to drop the wiki lock to avoid deadlocking the
  commit hook, it was possible for one CGI to race another one and "win"
  the commit of both their files. This race has been fixed by adding a new
  commitlock, which when locked by the CGI, disables the commit hook
  (except for commit mails). The CGI then takes care of the updates the
  commit hook would have done.