message: Ignore case in userblacklist
diff: @@ -122,6 +122,9 @@ class PikaConf : public slash::BaseConf {
  void SetUserBlackList(const std::string &value) {
  RWLock l(&rwlock_, true);
  slash::StringSplit(value, COMMA, user_blacklist_);
  + for (auto& item : user_blacklist_) {
  + slash::StringToLower(item);
  + }
  }
  void SetReadonly(const bool value) {
  RWLock l(&rwlock_, true); readonly_ = value;
  