Log message:
bulk-medium/large: rearrange emacs again.

At gdt's suggestion, put emacs-nox11 in bulk-medium; it doesn't pull
in rust. The x11 emacs, which does, goes in -large, as does
emacs-packages, which will pull it in by default.

As before (but this wasn't visible in -medium's commit log) depend on
the meta-package instead of an explicit emacs version.

This moves the version of emacs we're building from 26 to 28. As best
anyone's been able to figure, the only reason these were building 26
was bitrot. :-|

While here,
  - don't list xemacs in both -medium and -large; it goes in -medium;
  - list xemacs along with xemacs-packages; this does not change what
    actually happens, but makes things a lot clearer to passersby.

Log message:
bulk-large: get emacs from the editors/emacs metapackage

This way we don't have to track the default version explicitly, which had
bitrotted.

Log message:
bulk-large: fix previous by putting bsd.prefs.mk in the correct place

Log message:
bulk-small/medium/large: restrict rust to bulk-large

Rust is too expensive for bulk-medium (let alone bulk-small, where it's
crept in recently via libimagequant.)

Move the packages that were pulling it in to bulk-large.

XXX: Since this includes (modern) emacs we may need to reconsider :-|

Log message:
bulk-{medium,large}: move inclusions of bulk-* to the top, expand explanation.

Requested by gdt.

Log message:
meta-pkgs/bulk-large: update to 20230903

- www/ruby-rails52, www/ruby-rails60
+ www/ruby-rails70

Log message:
bulk-large: Don't build entire Xorg if X11_TYPE=native

Log message:
*: recursive bump for Python 3.11 as new default

Log message:
*: remove more references to Python 3.7

Log message:
bulk-large: not for Python 3.9 due to blender