Log Message:
Update to 2.10.0.0. From the changelog:

- Bugfixes.
- Changes to s6-svscan and s6-svscanctl: the list of commands
  that can be sent to s6-svscan has been thoroughly cleaned up.
  s6-svscan now scans and prunes on SIGHUP.
- Changes to s6-supervise and s6-svc: -X not supported anymore,
  nosetsid not supported anymore. SIGHUP now properly closes
  stdin/stdout to allow the service to naturally exit on EOF;
  SIGQUIT semantics changed to immediately bail. SIGINT is now
  trapped and forwarded to the service's process group.
- New binary: s6-svperms, implementing a split permissions
  model. (By default, everything is the same as before.)
- New binary: s6-usertree-maker, creating service directories
  for supervision trees managed by users.