Using 'register' and ^L

[Dmitry Antipov]

1) Is there a reason to use explicit 'register' variables nowadays?
   This encumbers sources with no measurable benefits; moreover,
   some GC tracing/debugging techniques assumes that you can take
   an address of any Lisp_Object, which is effectively blocked by
   using 'register'.

2) Why still using ^L?  It looks like a huge empty space in patches
   showing as attachment in some e-mail clients, and I'm curious
   whether someone still uses a printing system relying on ^L page
   breaks :-).

Dmitry