rename KB_DELAY to KBD_DELAY, enable use via KERNCONF, update docs

[paepckehh]

new approach for #647

Allow the customization of KBD_DELAY as KERNCONF option, consistently rename existing KB_DELAY to KBD_DELAY to keep kernel option prefix consistent, add docs.

Existing KERNCONF options for the KBD_ prefix are:

[...]
# kbd options
KBD_DISABLE_KEYMAP_LOAD	opt_kbd.h
KBD_INSTALL_CDEV	opt_kbd.h
KBD_MAXRETRY		opt_kbd.h
KBD_MAXWAIT		opt_kbd.h
KBD_RESETDELAY		opt_kbd.h
KBDIO_DEBUG		opt_kbd.h
[...]

This unlocks:

• allow to customize this parameter within user land less embedded and security appliances
• allow to specify custom parameter-sets that are not supported via kbdcontrol fixed ranges/sets

No change in default behavior .

CI tests: D38603

[paepckehh]

updates done for atkbc.4 and UPDATING as requested,
added (optional) NOTES entries as proposal

[bsdimp]

I think we're super close now. I'll download it tomorrow (later in your day :) and see if there's anything last minute that needs changing, or if I need you to do anything else.

[paepckehh]

I think we're super close now. I'll download it tomorrow (later in your day :) and see if there's anything last minute that needs changing, or if I need you to do anything else.

Thank you! Yes, GitHub really needs a local daylight indicator, flagging overlapping hours.
Hope we are still fast enough to MFC for 13.2?

[igalic]

it exists, but is only shown on the desktop view.

in addition, i live in Ireland (Republic) but as far as timezone selection goes, i get London, Edinburgh, Lisabon and Monrovia.

i think someone at GitHub needs to learn about the strained political relationships these islands have

[bsdimp]

Landing... folded a few commits together and had to fix some trailing white space.

[bsdimp]

Also, next time, when updating, please update with a rebase rather than a merge...

[paepckehh]

Also, next time, when updating, please update with a rebase rather than a merge.

Yes, sorry for that. Its always tempting to use the github web interface for small fixes
like this. But at the end its always a mess. For new requests I will migrate back to a native
git tool set & workflow.

Thank you for your great support!