Add a new per-group SUBPACKAGE option to bsd.man.mk.  When MANSPLITPKG
is enabled, this is forced to "-man", otherwise it defaults to empty
but can be overridden by the caller.

Use this in bsd.lib.mk to install library manpages in the -dev package
instead of the base package.  This is nearly always preferable, since
library manpages are usually in section 2 or 3 and are only relevant
to people with development packages installed.

For manpages which should be installed in the base package even for
libraries, add a new MANNODEV group in bsd.lib.mk.  Update existing
Makefiles to use this where appropriate.

MFC after:	3 days
Discussed with:	olce
Reviewed by:	olce
Sponsored by:	https://www.patreon.com/bsdivy
Differential Revision:	https://reviews.freebsd.org/D52832

libedit isn't as foundational as the rest of -clibs, but various bits
of -runtime do need it.  Give it a new home over in -runtime.

This also fixes the libedit build to group the readline bits into the
same package as the libedit that implements them.

Reviewed by:	ivy
MFC after:	2 days (pkgbase movement)
Differential Revision:	https://reviews.freebsd.org/D52787

After the recent import, explicit set of WARNS=3 is not needed.

After building packages we have a number of new
and updated Makefile.depend files

Reviewed by:	stevek

This is a residual of the $FreeBSD$ removal.

MFC After: 3 days (though I'll just run the command on the branches)
Sponsored by: Netflix

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl script.

Sponsored by:		Netflix

This fixes make pseudo/toolchain.

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

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/