Document r267379, arc4random(3) merge.

Approved by:	re (implicit)
Sponsored by:	The FreeBSD Foundation
MFC r267109, r267179: Update vt(4) "Terminus BSD Console" font

  "Terminus BSD Console" is a derivative of Terminus that is provided
  by Mr. Dimitar Zhekov under the 2-clause BSD license for use by the
  FreeBSD vt(4) console.

  Clarify statement on font origin

Approved by:	re