VARNAME"
>requires</TT
> (<TT
CLASS="TYPE"
>string</TT
>)</DT
><DD
><P
>        A list of names of extensions that this extension depends on,
        for example <TT
CLASS="LITERAL"
>requires = 'foo, bar'</TT
>.  Those
        extensions must be installed before this one can be installed.
       </P
></DD
><DT
><TT
CLASS="VARNAME"
>superuser</TT
> (<TT
CLASS="TYPE"
>boolean</TT
>)</DT
><DD
><P
>        If this parameter is <TT
CLASS="LITERAL"
>true</TT
> (which is the default),
        only superusers can c