MFC r291377: vidfont: with vt(4) omit size from vidcontrol -f

When using syscons, vidfont extracts the font size from the filename
passes it to vidcontrol -f. In vt(4) mode the size argument is not
required, and some of the fonts in /usr/share/vt/fonts do not have the
size in the filename, which caused vidfont to fail. Thus, just omit the
size argument in vt(4) mode.

MFC r282904: kbdmap(1): increase description size to 256 bytes

After conversion to UTF-8 some INDEX.keymaps descriptions are longer
than the previous limit of 64 bytes.

PR: 193656

MFC 269976.

Add support for NEWCONS to kbdmap and vidfont.

MFC r282904: kbdmap(1): increase description size to 256 bytes

After conversion to UTF-8 some INDEX.keymaps descriptions are longer
than the previous limit of 64 bytes.

PR: 193656

MFC 269976.

Add support for NEWCONS to kbdmap and vidfont.