message: check that woriking and maintenance database names differ
diff: @@ -48,6 +48,13 @@ PostgresOptions::PostgresOptions(const std::string &pg_creds,
  working_dbname_ = std::move(working_dbname);
  }
  + if (working_dbname_ == maintenance_dbname_) {
  + log->warn(
  + "Working database has the same name with maintenance database: '{}'. "
  + "This may cause failures.",
  + working_dbname_);
  + }
  +
  removeConsequtiveSimilarSpaces(pg_creds_);
  }
  