Make C-u work like in shells/readline, remove C-d

[osa1]

Currently C-u and C-d scrolls up and down, respectively. These keys were copied from vim (normal mode).

However we already have other keys for this: page up and down, and C-u removes parts before the cursor in the current line in bash, readline, emacs, and vim insert mode.

So I think it makes sense to make C-u consistent with the other tools, and remove C-d. Less stuff to learn.

[Kabouik]

Do you plan on implementing alternatives other than PGDN and PGUP for page scrolling? Not all keyboards have those keys, and visual scrolling using mouse wheel or touch screen doesn't work in things like mosh.

I understand, however, that keyboards with no PGDN/PGUP keys and tiny used through mosh might not be a common combination (but it's my case!).

[osa1]

@Kabouik shift+up/down also scrolls, but just one line instead of one "page". Does that combination work in mosh?

[Kabouik]

Yes those combination because they rely on Tiny's scrollback feature, not mosh's (which doesn't really allow scrolling by itself, see #122), but one line at a time can be an issue sometimes. Maybe something like Ctrl+Shift+Up could work? No idea if that is standard though, probably not, and it may be conflicting with other things.