Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

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

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Forward declare z_errmsg with static linkage since it is defined
with static linkage later in the file. Eliminates GCC 4.0 error.

/* -> /*- for license, minor formatting changes

Give zlib the ability to be a module that can be depended on,
in the MODULE_DEPEND() sense.

chase more of the MIN/MAX mess. *sigh*

Consolidate MIN/MAX macros into one place (param.h).

Submitted by: Hiten Pandya <hiten@unixdaemons.com>

Fix instances of macros with improperly parenthasized arguments.

Verified by: md5

We have mem{cpy,cmp,set} functions in the kernel, don't #define them to
b{copy,zero,cmp} functions anymore.

Spotted by: FlexeLint.

Work around zlib bug where using a deflate window size of 8 will
cause memory corruption.

Fix a bug introduced in 1.11 (and also MFCd to stable AND the security branch)
that causes a machine to panic when the kernel PPP / DEFLATE code is used.
1.11 moved a ZFREE to a point after the structural members were clobbered
by stores into a union'd structure.

This commit fixes the bug and adds a big whopping comment to make sure
the code isn't 'cleaned up' again :-)

Ian Dowse came up with the same patch independantly 68 seconds before I
did, talk about Karma!

I would also like to thank Eugene Grosbein for marathon work in tracking the
problem down by udpating his -stable based on date over and over again
to close in on the commit that caused his crashes.

PR: kern/35969
Reviewed by: Ian Dowse <iedowse@maths.tcd.ie>
X-MFC after: immediately

Error handling fixes for inflate.

Change #ifdef KERNEL to #ifdef _KERNEL in the public headers. "KERNEL"
is an application space macro and the applications are supposed to be free
to use it as they please (but cannot). This is consistant with the other
BSD's who made this change quite some time ago. More commits to come.

$Id$ -> $FreeBSD$

Fix warnings in preparation for adding -Wall -Wcast-qual to the
kernel compile

Merge ppp changes from 2.3.3 -> 2.3.5. I have spotted some more
problems, which I'll have a go at shortly.

Update kernel parts of ppp to ppp-2.3.3. Not much has changed except
that the deflate components use zlib 1.0.4 instead of zlib 0.95.

Staticize.

Removed unused #includes.

Update kernel parts of pppd from 2.2.0 to 2.3.0. I've yet to look at the
2.3.0 -> 2.3.1 changes, but I seem to recall that there are certain
"issues" with 2.3.1 (I'm not sure if it's just pppd or the whole lot, I
am not quite that far). The present pppd seems to work with it just fine
for the time being.

Among the changes are that zlib (aka LZ77 aka deflate aka gzip) compression
is implemented as well as the original compress(1) LZW style.