XChat 2.6.7a

- Added proper support for unicode time stamps and log filenames so that non-English ones work correctly (e.g. Non-ASCII days of the week now work, such as Cyrillic).
- Fixed a few text printing bugs when running in Spanish. Please report if there are still some remaining problems.
- Handle gracefully plugins that try to execute commands with invalid UTF-8.
- Improved handling of irc:// links from web browser, as not to make another connection unless absolutely necessary.