Add support for max term width

[kbknapp]

Similar to the default, except that even when term size can be determined don't go above max

[nabijaczleweli]

As in #639 or?

[kbknapp]

Right now if the term size can't be determined it defaults to 120. But if the term size can be determined and it's really big (I.e. I use a full screen term most of the time), I'd like the ability to say if the term size is huge go ahead and wrap at 120 or whatever number.

[nabijaczleweli]

IOW force term width override?

[kbknapp]

Kind of, I don't want to say always wrap at a specific width because the width may be smaller which would create weird line breaks. I want to say wrap at x width unless it's smaller then wrap there instead