- missing localisation for an imageset shouldn't create lots of "imageset refreshed" log messages [Bug #12027]
- explain that themes which need parsing cannot be stored on the filesystem [Bug #11134]
- normalize usernames (we really need to make sure we normalize everything)
- improved utf8_clean_string, more complete list of homographs and NFKC normalization, also the resulting string is now trimmed
- corrected searching subforums explanation [Bug #12209]
git-svn-id: file:///svn/phpbb/trunk@7890 89ea8834-ac86-4346-8a33-228a782c2dd0