no_new_pseudos

[Richard Kenner]

> The bad abstraction was causing quirks in *when* no_new_pseudos was set
> to 1.  But no_new_pseudos is a good abstraction in itself, people are
> arguing on whether it is a better abstraction as "reload_in_progress ||
> reload_completed".

I argue that because both have historically been misused, the right
abstraction to answer the question "can I allocate a pseudo now?" is some
new name.