Allow customization of wrapping controls.

[kentfredric]

Until now I've abused the fact wrapping is implemented in terms of Text::Wrap, and coerced Text::Wrap to have some less insane defaults.

Some of those are outlined here: https://rt.cpan.org/Ticket/Display.html?id=95736

$Text::Wrap::break='[\x09\x20]';
$Text::Wrap::huge='overflow';

And both of those are important because the first prevents unicode NONBREAK-SPACE (0xA0) from being wrapped on, and the second prevents long tokens ( like URI's ) from being uselessly snapped in two.

The last one I do personally is localise

$Text::Wrap::columns = 120

Because under 80 columns I find far too restrictive for any serious amount of text.

And this ability has been clobbered by 087f3b7 , where it localises it at a scope closer than I can access.

[haarg]

For now, I've backed out the change to force wrapping at 78 characters. I'm intending to replace the entire internal implementation though, and currently it doesn't use Text::Wrap at all. So we still should figure out a better way to handle this.

[haarg]

For reference, @kentfredric's preferred break and huge settings are now being set internally because they are much more sensible.