- Expose tport_setname() and tport_wakeup() via tport_internal.h
- Add tport_register_secondary() for adding secondaries to a root, and
  to alleviate the need to export tprb_append.

darcs-hash:20081216175826-2152f-1a5680d4ca61ba2405b497cfc12bde3a776bfd64.gz