Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

MFC 219886, 226100, 226111, 226341, 242529, 259015, 259016, 259019, 259049,
259071, 259102, 259110, 259129, 259130, 259178, 259179, 259203, 259221,
259261, 259532, 259615, 259650, 259651, 259667, 259680, 259727, 259761,
259772, 259776, 259777, 259830, 259882, 259915, 260160, 260449, 260450,
260688, 260888, 260953, 261269, 261547, 261551, 261552, 261553, 261585
o Merge vt(4) virtual terminal (a.k.a. newcons) to stable/9.
o Merge teken updates.
o Add few more tty methods required by vt(4).
o Update syscons(4) to work with fresh teken.

Sponsored by: The FreeBSD Foundation

Merge VT(9) project (a.k.a. newcons).

Reviewed by: nwhitehorn
MFC_to_10_after: re approval

Sponsored by: The FreeBSD Foundation

Implement minimum ioctls set for framebuffer device.

Sponsored by: The FreeBSD Foundation

Handle suspend/resume. Switch to console window before suspend, switch back on
resume. That fix issue with broken Xorg image after resume.
Fix some style whilst here.

Sponsored by: The FreeBSD Foundation

Allow to use fb_probe() outside of driver.

Sponsored by: The FreeBSD Foundation

Fail to attach if fb_info not passed.

Sponsored by: The FreeBSD Foundation

Add link to drmn device.

Sponsored by: The FreeBSD Foundation

Allow fbd to be attached as newbus device.

Sponsored by: The FreeBSD Foundation

Use copy method which maybe defined by framebuffer provider, but not just
memmove.

Sponsored by: The FreeBSD Foundation

Add generic/simple framebuffer.

Sponsored by: The FreeBSD Foundation