Use input type `number` for numbers
Use input type `email` for login-name
Use input type `url` for urls in AFS
Add macro `url` to html/AFS/input.jnj
Change `right.role_type` to `_Regatta_`
Set `PMA.default_encoding` in all cases
Revert "Factor `GTW.OMP.SRM._Regatta_`"

This reverts commit fbded30f05d1eeb45634b9d4028409dec9fa85a3;
plus related commits a4e78bdd4f7c39a3df948cd4003c38a5683e8439
and 9166bc90835b78733846c045003cba3bdf333e89.
Add and use `a_attr_dict` for GTW.RST resources
Add `A_Link` to `GTW.RST` and `GTW.RST.TOP`
Add `A_Link` to `DJO.NAV`
Add `GTW.NAV.A_Link`
Fix SAW handling of `_A_Named_Object_` attributes

* Redefine `_A_Named_Object_.cooked`.

* Call `pickler.as_cargo`, if any, in `_xs_filter_rhs` of
  `SAW.QX._Base_`.

* Add tests