message: Fix language selector. It didn't work.
diff: @@ -1322,14 +1322,19 @@ bool CUser::SetStatusPrefix(const CString& s) {
  }
  bool CUser::SetLanguage(const CString& s) {
  - // They look like ru_RU
  + // They look like ru-RU
  for (char c : s) {
  - if (isalpha(c) || c == '_') {
  + if (isalpha(c) || c == '-' || c == '_') {
  } else {
  return false;
  }
  }
  m_sLanguage = s;
  + // 1.7.0 accidentally used _ instead of -, which made language
  + // non-selectable. But it's possible that someone put _ to znc.conf
  + // manually.
  + // TODO: cleanup _ some time later.
  + m_sLanguage.Replace("_", "-");
  return true;
  }
  // !Setters
  