JSON_UNESCAPED_LINE_TERMINATORS, to disable the
     escaping of U+2028 and U+2029 characters when
     JSON_UNESCAPED_UNICODE is supplied.
    
   nextval has not been called for the current
     session (the postgres connection).
    
   PGSQL_NOTICE_LAST,
     PGSQL_NOTICE_ALL, or
     PGSQL_NOTICE_CLEAR.
    
   false and no longer
     initializes $_SESSION when it failed to start the
     session.
    
   