Default PAGER -> less

[coypu%sdf.org@localhost]

Hi!

I like good defaults. 'more' as PAGER means that when I scroll to the
bottom of a man page, it closes the man page.

Apparently that is 'normal more behaviour'.
I can change just mdocml to fallback to less, but that would be awkward,
because other things may default otherwise(?).

I thought of making the default .profile snippet set PAGER=less.
thoughts?