Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

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

Warn users when using pkg tools if it looks like they
be be pkgng users.

Reviewed by: bapt (earlier version)
Reviewed by: kwm
Approved by: cperciva
MFC after: 3 days

Backout libinstall.a -> libpkg commit.

Discussed with: erwin, brooks, bapt

For variables that are only checked with defined(), don't provide
any fake value.

Don't put DEBUG to CFLAGS, we have the standard DEBUG_FLAGS for this.

Downgrade WARNS level to more tolerable value. Attempt to fix
casts as lvalue usage whenever possible.

- pkg_add spawns itself as argv[0] when installing dependent packages, to
enable the use as a port on older systems

- use absolute paths in all calls to external programs, to account for strange
PATH settings

- use INDEX or INDEX-5 depending on FreeBSD version, to enable the use on
FreeBSD 4.x as a port.

- conditionalize all 4.x/5.x differences on __FreeBSD_version, so that the
pkg_install tools can be kept in sync on 4.x and 5.x

- Bump PKG_INSTALL_VERSION

Reviewed by: portmgr (bento run)
MFC after: 4 weeks

Break fileGetURL() out into its own file so that pkg_install/lib consumers
pkg_{create,delete} don't need to needlessly link with libfetch.

Sigh, finally activate pkgwrap.c.

Big pointy hat to: sobomax (who apparently needs some sleep)
Submitted by: walt <wa1ter@hotmail.com>

Mark all internal libraries with INTERNALLIB.

- Introduce a notion of `packing list format version'. This allows making
non-backward compatible changes in the format of packing list and handle
them gracefully;
- fix a longstanding issue with symlinks handling. Instead of recording
checksum for the file symlink points to, record checksum for the value
returned by readlink(2). For backward compatibility increase packing list
format minor version number and provide a fallback to a previous behaviour,
if package in question was created with older version of pkg_* tools;

Submitted by: Alec Wolman <wolman@cs.washington.edu>, sobomax

- don't record MD5 checksum for device nodes, fifo's and other non-regular
files.

Submitted by: nbm
MFC in: 2 weeks

WARNS=2 cleanup.

Tested on: i386, alpha
MFC after: 2 weeks

Perform a major cleanup of the usr.sbin Makefiles.
These are not perfectly in agreement with each other style-wise, but they
are orders of orders of magnitude more consistent style-wise than before.

When creating a package sort dependencies in such a way that if dependency
A depends on dependency B then dependency A will be in all cases listed
before B, so ``pkg_add -r'' will fetch/install packages in the correct order.

Previously dependencies were sorted just by its names, which is why
``pkg_add -r'' never actually worked properly.

To be usefull, hovewer, this fix requires that all packages have been
rebuilt, so it will take some time until users would be able to feel
posititive improvements. For the same reasons it is desirable to propagate
these changes to the 4-stable package building cluster *before* 4.3 ports
freeze, so packages for 4.3-RELEASE would be properly prepared.

Prompted by: kris
Insanely appreciated by: obrien
Silently approved by: jkh, -ports

- Merge recently added into pkg_info(1) regex/glob matching functionality into
pkg_delete(1) as well;
- add a new `-a' option for pkg_delete(1) to delete all installed packages;
- add a new `-i' option for pkg_delete(1) to request simple rm(1)-like
interactive confirmation before attempting to delete each package.

Silently approved by: jkh, -ports

Make pkg_install understand and use libftpio instead of its own
copies of the ftp support routines. Also some cosmetic and minor
bug fixes I've been meaning to incorporate for awhile.

Add ftp.c to makefile - that might make it work better. Sheesh!

More changes from John T. Kohl. Man pages, mostly.
Submitted by: jtkohl

Lots of misc tweaks, support for arbitrary separators in pkg_info, more
intelligent name handling in pkg_create. Most of these files are changed
because of rcsid's being different in my cvs tree and freefall's (foo).

Removed annoying -Wall

This commit was generated by cvs2svn to compensate for changes in r327,
which included commits to RCS files with non-trunk default branches.

The release version of my package install suite. Please see man pages
for info.