Add quotes to some shell variables overlooked in previous commit.

Ensure that (almost) all shell variables in distrib/sets/* scripts are
used with curly braces and quotes, as in "${var}".

Also ensure that command substitution is quoted, as in "$(command)", and
con

Ensure that (almost) all shell variables in distrib/sets/* scripts are
used with curly braces and quotes, as in "${var}".

Also ensure that command substitution is quoted, as in "$(command)", and
convert `command` to $(command).

Reviewed by agc

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Add shell variables defined in sets.subr for almost all commands used
by scripts in distrib/sets/*. This is intended to be useful when cross
building. Only trivial commands like echo, cat, and rm a

Add shell variables defined in sets.subr for almost all commands used
by scripts in distrib/sets/*. This is intended to be useful when cross
building. Only trivial commands like echo, cat, and rm are excluded
from this treatment.

While I am here, make ${MTREE} and ${DB} follow the pattern used by most
other such variables.

Reviewed by agc.

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Make all the sets scripts work even when not run from the directory that
they reside in.
Change any uses of dirname to use shell variable substitution instead.

rename all the <bsd.own.mk> derived variables to uppercase, and export
them to the environment.

Significant overhaul of how the sets are used:

* Add an optional third field to the sets file which is a list of
comma separated keywords that control if the line is printed.
Currently supported

Significant overhaul of how the sets are used:

* Add an optional third field to the sets file which is a list of
comma separated keywords that control if the line is printed.
Currently supported keywords
kerberos4 ${MKKERBEROS4} != no
kerberos ${MKKERBEROS} != no
lint ${MKLINT} != no
obsolete ${obsolete} != 0.
In this case, non obsolete files are not printed.
(This will allow future support for builds with variables such as
MKHESIOD and MKYP set to "no".)

* Use sh(1)'s getopts where appropriate, and otherwise cleanup the
various scripts.

* Move defaults for sets.subr from sets.defaults into sets.subr.
Move replicated code for determining stuff such as shlibs type
from various scripts into sets.subr.

* Merge the obsolete.*, krb.*, krb4.* and lint.* into the appropriate
main lists with the relevant third field keyword(s).

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Factor duplicated code for setting variables such as machine_cpu
and machine_arch to their defaults into sets.defaults, and source
it at the top of each script.

Also, to be consistent with variable

Factor duplicated code for setting variables such as machine_cpu
and machine_arch to their defaults into sets.defaults, and source
it at the top of each script.

Also, to be consistent with variable naming, s/arch/machine_arch/.

sets.defaults introduces two new variables, krb and krb4, which
will affect whether Kerberos- or Kerberos IV-only files are put
into the set lists.

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Stop duplication of makeflist, regpkg, makeplist code. Use routine
in sets.subr, instead.

set MAKE="${MAKE:-make} -j 1" to prevent problems where the output
of make -j N>1 would result in junk in various shell variables

Rename arm26 -> acorn26.

- fix the comment describing what this does
- " egrep ... | awk " can be replaced by a smarter bit of awk...

Add two utility scripts used by syspkg from draga.com CVS:

listpkgs -- a utility script for syspkg maintainers. Given a pkgset name,
list all packages in that pkgset by parsing the src/distrib

Add two utility scripts used by syspkg from draga.com CVS:

listpkgs -- a utility script for syspkg maintainers. Given a pkgset name,
list all packages in that pkgset by parsing the src/distrib
set list files. Imported at draga.com revision 1.2.

Usage: ./listpkgs [-a arch] [-m machine] [-s setsdir] [-p prefix] setname
-a arch set arch (e.g, m68k, mips, powerpc)
-m machine set machine (e.g, amiga, i386, macppc)
-s setsdir directory to find sets
setname set to list packages for

makeplist -- a script called by <bsd.syspkg.mk>. Given a pkgset name
and a pkg name, output a valid PLIST for that package by
parsing the src/distrib set list files. Imported at
draga.com revision 1.2.

Usage: ./makeplist [-a arch] [-m machine] [-s setsdir] [-p prefix] setname pkgname
-a arch set arch (e.g, m68k, mips, powerpc)
-m machine set machine (e.g, amiga, i386, macppc)
-s setsdir directory to find sets
-p prefix prefix for created plist
setname pkgname set and package to build plist for

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