Remove $FreeBSD$: one-line .c comment pattern

Remove /^/[*/]\s*\$FreeBSD\$.*\n/

SPDX: license IDs for some ISC-related files.

Sync with OpenBSD, primarily better signal and terminal handling.

Obtained from: OpenBSD
MFC after: 2 weeks

A new jail(8) with a configuration file, to replace the work currently done
by /etc/rc.d/jail.

Create the altix project branch. The altix project will add support
for the SGI Altix 350 to FreeBSD/ia64. The hardware used for porting
is a two-module system, consisting of a base compute module and a
CPU expansion module. SGI's NUMAFlex architecture can be an excellent
platform to test CPU affinity and NUMA-aware features in FreeBSD.

- Import the HEAD csup code which is the basis for the cvsmode work.

Define the size_t type since readpassphrase(3) requires it in its
definition and sys/types.h is not listed within the synopsis of the man
page.

MFC after: 1 week

Synch with OpenBSD (style).

Introduce readpassphrase(3), a superset of getpass(3). This
comes originally from Todd Miller.

Obtained from: OpenBSD