Reply does not handle newlines correctly

[cesium@mit.edu]

If I send a zephyr to instance "ab\ncd", and then reply to it, the zwrite line looks like

----> zwrite -c foo -i ab
cd

This causes the zephyr to be sent to class foo instance ab, as well as the single recipient cd.

If I reply to instance "ab\ncd ef", on the other hand, or include quotes inside the instance, BarnOwl seems to quote correctly.

[davidben@mit.edu]

We've got a number of issues when inserting a line break into the command line. search, for instance, gets very very confused. Perhaps we want to use only soft line breaks (does the editwin support that well?) in single-line editwins.

It'd also be good to make sure all our tokenizing code handles newlines properly, but I believe a lot of commands do their own parsing?

[nelhage@mit.edu]

While we should deal with the broader issues of handling newlines in the command line, I think the proximal issue for this ticket is that BarnOwl::quote doesn't quote newlines (and tabs, as it turns out) properly.

I'll throw together a patch later today.