Log Message:
chat/icbirc: Update to 2.1

2.1:
  Return *** as nick in IRC error messages (where missing), add
  pledge(2) call on OpenBSD, from semarie@.

2.0:
  Merge OpenBSD port patches, originally from ray@ in 2009:
  Fix corruption that occurs when connecting and reconnecting to icbirc
  repeatedly. After a while, icbirc starts reusing the command buffer
  from a previous connection, causing all further connections to
  incorrectly parse commands.