Upgrade silc-client to version 1.1.4. This fixes two security issues and
various character set problems. The security issues fixed:
* NICK_CHANGE buffer overflow: CVE-2007-3728.
* pkcs_decode buffer overflow: CORE-2007-1212.

Changes since version 1.0.4.1:
- Fixed NEW_CLIENT packet handling crash.
- Fixed partial encryption in CTR mode in AES.
- Fixed printable fingerprint buffer overflow.
- Fixed UNIX signal delivery il SILC scheduler.
- Reprocess JOIN command synchronously after resolving channel user list.
- In JOIN command reply check if the channel key is already saved.
- Remove all channel keys and hmacs after giving LEAVE command.
- Added missing channel unreferencing in CMODE, CUMODE, TOPIC, INVITE,
  BAN and KICK command replies.
- Fixed connection authentication with public keys to use correct public
  key as responder.
- Zero tail of CTR mode IV in IV Included mode.
- Fixed CTR mode rekey.
- Rewrote the IV Included CTR mode encryption/decryption in packet engine.
- Fixed non-IPv6 compilation error.
- Fixed channel private key deleting when deleting the channel.
- Fixed TIMEOUT handling in user info resolving during JOINing, fixes crash.
- Fixed mandatory UN and HN SILC public key identifier checking.
- Fixed alignment issues with 64-bit CPUs.
- Added "There are now xx nick's" to "are xx nicks".
- Fixed USERS command user mode handling (integer overflow).
- Fixed big-endian issues from aes implementation.
- Fixed lib/silcutil/silcatomic.h compilation on IA64.
- Fixed public key identifier parsing to check lengths correctly.
- In silc_client_free check that scheduler is allocated before trying to
  free it.
- Fixed buffer overflow in NICK_CHANGE notify. The destination buffer for
  old nicknames was too small.
- Added support for rekey with PFS when using CTR mode encryption.
- Added silc_idcache_move that can be used to move entries between caches.
- Added better checks for invalid argument and notify payloads.
- Fixed SILC_PACKET_FLAG_LONG_PAD bitmask value.
- Set the destination ID to packet stream as SKE responder if ID was
  present in key exchange packet.
- Compile sources with _GNU_SOURCE on Linux systems.
- Fixed Unix signal task dispatching to not lock the signals when
  dispatching the callback to avoid deadlocks.
- Added SILC_VERSION macro for checking package versions at compile time.
- Use SILC_VERIFY to assert that silc_rwlock_wrlock can be called only
  once per thread on Unix.
- Fixed USERS command reply write-lock unlocking.
- Fixed silc_create_key_pair to check for valid identifier.
- Rewrite signed public message handling, adopting the new hilight interface.
- Fix off by one error when loading modules.
- Don't delete hilight entry (because it's just a pointer, not a copy).
- Added __SILC_TOOLKIT_x_x_x macro to all Toolkit distribution which can
  be used to check for Toolkit version in third-party software.
- Added support for channel@server channel name strings to client library
  (SILC protocol version 1.3 change).
- Added full_nicknames and full_channel_names settings to SilcClientParams
  that can be used to specify whether client library returns full nickname
  and channel name strings. Full strings are nick@server and channel@server.
- Fixed unix connecting failure to return error code correctly.
- Fixed SKE timeout double free crash.
- Fixed MIME multipart decoding buffer overflow.
- Fixed connection auth protocol timeout crash.
- Fixed FSM machine finishing to check for existing threads at the final
  free callback to allow time for the threads to finish.
- Fixed silc_client_get_clients_local to check the nick's server also if
  nick@server nickname string is given to the function.
- And many more, oh well. For the user this means: better charset support,
  less crashes, nick names now potentially user#23, server specific
  channels and more sanity.

Talked over a while ago with wiz with no objections.

(tonnerre)