add a changelog for rc1

Changes so far in 0.0.9:

rc1:

  o Bugfixes on 0.0.8.1:

    - Finally fix a bug that's been plaguing us for a year:

      With high load, circuit package window was reaching 0. Whenever

      we got a circuit-level sendme, we were reading a lot on each

      socket, but only writing out a bit. So we would eventually reach

      eof. This would be noticed and acted on even when there were still

      bytes sitting in the inbuf.

    - When poll() is interrupted, we shouldn't believe the revents values.

  o Bugfixes on 0.0.9pre6:

    - Fix hibernate bug that caused pre6 to be broken.

    - Dont keep rephist info for routers that havent had activity for

      24 hours. (This matters now that clients have keys, so we track

      them too.)

    - Never call close_temp_logs while validating log options.

    - Fix backslash-escaping on tor.sh.in and torctl.in.

  o Features:

    - Implement weekly/monthly/daily accounting: now you specify your

      hibernation properties by

      AccountingMax N bytes|KB|MB|GB|TB

      AccountingStart day|week|month [day] HH:MM

        Defaults to "month 1 0:00".

    - Let bandwidth and interval config options be specified as 5 bytes,

      kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.

    - kill -USR2 now moves all logs to loglevel debug (kill -HUP to

      get back to normal.)

    - If your requested entry or exit node has advertised bandwidth 0,

      pick it anyway.

    - Be more greedy about filling up relay cells -- we try reading again

      once we've processed the stuff we read, in case enough have arrived

      to fill the last cell completely.

    - Apply NT service patch from Osamu Fujino. Still needs more work.

pre6:

  o Bugfixes on 0.0.8.1:

    - Fix assert failure on malformed socks4a requests.

      as a hex ID, and we can't predict what the other side will do.

    - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our

      write() call will fail and we handle it there.

    - Add a FAST_SMARTLIST define to optionally inline smartlist_get

      and smartlist_len, which are two major profiling offenders.

  o Bugfixes on 0.0.9pre5:

    - Fix a bug in read_all that was corrupting config files on windows.

      it's misleading, because it will never be the same again.

    - Stop using strlcpy in tor_strndup, since it was slowing us

      down a lot.

    - Add a FAST_SMARTLIST define to optionally inline smartlist_get

      and smartlist_len, which are two major profiling offenders.

    - Remove warn on startup about missing cached-directory file.

    - Make kill -USR1 work again.

    - Hibernate if we start tor during the "wait for wakeup-time" phase