Checkpatch cleanups.
I would like to merge winterm.c back into term.c. Start with the easy
merges.
Merged winterm into term.
Got rid of display-bindings command. With the beefed up help, it was
not very useful and the output was ugly.

With display-bindings gone, dispkey + friends could be moved to
help. All the *kbd files need to export is the special keys label.

I am not going to merge kbd and winkbd, the implementations are too
different.