Remove $FreeBSD$: one-line sh pattern

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

Remove the WITHOUT_MANDOCDB option

mandoc database is activated since FreeBSD 11.0, let's remove the previous
database format for FreeBSD 12.0

Switch to mandoc's version of makewhatis(8), whatis(1), apropos(1) utilities.

This change among other things improve search capabilities over the manpages
allowing fine grain query.

A new build option WITHOUT_MANDOCDB has been added to keep the ancient version
of the database and the tools. The plan is to entirely remove this option before
11.0-RELEASE.

Differential Revision: https://reviews.freebsd.org/D2603

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

Implementaiton of man, manpath, whatis, and apropos written entirely in sh.

Features of this new version in favor of the old one:
BSD licensed -- old one is GPL.
Imports configuration from /etc/man.conf and LOCALBASE/etc/man.d/*.conf
allowing ports to extend the base functionality. The pluggable
configuration can supplement the manual search path (retiring use.perl),
add locales, and override language specific toolsets (attempt to merge
the japanese/man port into the base system as much as possible).

Much effort has been made to make this version mirror the functionality
of the existing implementation. For 99% of users, it should be a drop in
replacement.

PR: gnu/143271, gnu/4419
Reviewed by: dougb (previous versions)
Approved by: wes (mentor)

kill the undead

Finish importing Lite2's src/usr.bin, except for ex, diff, grep, mail,
pascal and vmstat.sparc. All changed files on the vendor branch should
already have been imported.

This commit was generated by cvs2svn to compensate for changes in r13122,
which included commits to RCS files with non-trunk default branches.

BSD 4.4 Lite Usr.bin Sources