Log Message:
Update "xchat" package to version 1.8.8. Changes since version 1.8.7:
- Updated Swedish translation (Christian Rose).
- Updated Spanish translation (Antonio de la Torre).
- Updated French translation (Olivier Berger).
- Updated Slovak translation (Stanislav Visnovsky).
- Updated Slovenian translation (Nejc Novak).
- Updated Japanese translation (Yukihiro Nakai).
- Fixed history OBO error (Lloyd Williams, Elizandro Garcia Roos).
- Fixed NLS not working properly under non-gnome build (Hiroyuki
  Yamamoto).
- Backported 64-bit fixes from 1.9.1.
- Auto detect socklen_t.
- Make nick completion work when completion-char is set blank.
- Avoid crash when /set truncchans too low.
- win32: Made a built-in OpenURL function that should work on NT too.
- Fixed ConnectCmd not being executed after a second connect through
  the serverlist.
- Use nicksuffix prefs in middle-click userlist.
- Fixed recursive wildcard match in /dcc send (debian bug 135348).