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

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

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Use the new command file feature of ddb(8) to support setting ddb(4)
scripts at boot. This is currently disabled by default. /etc/ddb.conf
contains some potentially reasonable default scripts.

PR: conf/119995
Submitted by: Scot Hetzel <swhetzel at gmail dot com> (Earlier version)
X-MFC after: textdumps