Log Message:
Upated to version 0.9.13,

Changes:

- remove patch-ab, merged into distribution
- cleanups in Makefile

0.9.13:
=======
- Lots of bugs was fixed.  Also several security bugs has been fixed.

- Inviting and banning now works with a public key.  Fixed also banning
  with nickname (example, /ban +nickname).

- Support for channel public key authentication added.  The CMODE command
  has a new option 'C', which can be used to add and remove channel
  public keys on the channel.  The channel public keys work the same way
  as the channel passphrase.  Only the person posessing the corresponding
  private key of the public key added on the channel is able to join the
  channel.  It is possible to add multiple channel public keys to the
  public key list.

  Give /HELP CMODE to see how to use the command.  If the /CMODE +C is
  given without arguments you will get list of current channel public
  keys.  This feature works only with new SILC Server 0.9.14 an newer.
  You will also need to be channel founder.

- Automatic lag detector, to detect lag between your client and your
  server.  The lag (if any) is displayed on the status bar.

- /ME, /ACTION and /NOTICE now fully supports UTF-8 text messages.

- Using '@' and '!' characters in invite and ban strings is prohibited.
  Those characters cannot be anymore used as part of invite and ban
  strings.

- Better caching of old channel keys (for period of 10 seconds) to avoid
  loosing any channel messages.