MFC r266463:

  - Include /etc/newsyslog.conf.d/* and /usr/local/etc/newsyslog.conf.d/* by
    default for newsyslog(8).

Relnotes:	yes
Approved by:	re (gjb)
MFH r266813: Don't break the legacy applications which set
just 2 bytes to salt.

Approved by:	re (gjb)