Suggested by op. tog now supports hscroll in all views so move corresponding keymap docs in tog(1) to global space (this was already the case in tog runtime help). While here, remove some copypasta with a new subroutine to handle hscroll input. ok op@ and stsp@

ok jamsek

Also, separate g/G from home/end in the manual and runtime help text as only the former accept a prefixed count modifier. Based on initial diff from Mikhail. ok stsp@

People coming from CVS might not expect names of patch contributers to show up in commit history listings, so make things easy for them. discussed with op@

The -h and -V/--version flags must be given before the command; with those flags the command is actually optional, but don't over-complicate the usage string with these nitpicks. ok/improvements stsp@

Original idea inspired from discussion with tb, tobhe, and stsp at g2k22: display view-specific help, with option to toggle display of full key map reference when {H,F1} is pressed again inside the help view. Includes improvements suggested by stsp. ok stsp@

Use the & key map to enter a pattern with which to limit the displayed commits to those matching the provided pattern; similar to less(1) and mutt's limit feature. Includes various tweaks from op. ok plus fixes from op@

Patch by Josiah Frentsos; ok kn@

patch by Josiah Frentsos

Add () and {} key maps to navigate to the previous and next file or hunk in the diff. This required changing Got's diff API to collect line type metadata in addition to the line offsets already produced as prompted by stsp. ok stsp@

Available to all views; for example, 99g will navigate to line 99 in the file if in a blame view or the 99th commit if in a log view. Includes improvements suggested by naddy and stsp. ok naddy@

ok stsp@

As per stsp's TODO item: open a log view of the selected line with 'L'. helped by and ok stsp@