[9fans] Updated Fourth Edition now available

["rob pike, esq." <rob@plan9.bell-labs.com>]

The inevitable sequence of glitches, omissions and outright errors
of putting out a distribution has gotten long enough that we have
put together an updated package.  Details are below, including
information about how to update if you've already got the previous
(April 27) package.

We plan to make future updates incremental and easy to apply.

Go to http://plan9.bell-labs.com/plan9dist for the updated package.

=====================

If you have already installed Plan 9 and wish to install the
changed files, the best way to do this is:

	* remove /dist/replica/plan9.iso* if they exist.
	* download a new install floppy (and optionally, archive)
	* boot the install floppy.
	* point mountfs at your kfs; tell it to `keep' your old fs
	* download the new archive or point mountdist at it
	* run copydist (note that bootsetup will be the default
	  since you've already got a 4e install, albeit an old one).
	* (optional) install the new kernel by drawing a new window
	  and running
		g% mount /srv/kfs._dev_sdC0_fs /n/kfs
		   (replace sdC0 with the disk holding your kfs)
		g% cp /n/kfs/386/9pcdisk /n/9fat
	* run stop (note that bootsetup will still be the default).
	* reboot without the floppy

If you feel like getting your hands dirty, you can avoid the
boot floppy download.  Download the CD-ROM image, uncompress it,
mount it on /n/dist, and then

	g% disk/kfscmd allow
	g% replica/pull /dist/replica/cd

After you do this you'll have to reboot, since pretty
much every binary gets updated (a bug was fixed in print).

In the near future, we will set up an external file server
so that it is not necessary to download the whole CD-ROM
image in order to get updates.

=====================

Here is a short list of the changes and affected files since the last package.
It is probably incomplete but the major changes are listed.

===== /sys/doc and /sys/man
Lots of documentation tweaks

===== /sys/src/cmd/ssh/pubkey.c
The first 11 downloads picked up a copy of
	/sys/src/cmd/ssh/pubkey.c
that could smash your saved keys.
You want to see this at /sys/src/cmd/ssh/pubkey.c:165
				h, mpsignif(k->n), k->ek, k->n);	/* correct */
If you have this, fix the line and recompile if you don't want to download.
				host, mpsignif(hostkey->n), hostkey->ek, hostkey->n);	/* incorrect */

===== /sys/src/libc/fmt/dofmt.c
Two parts: 1) missing code to implement %hh 2) fix portability problem with fetch

===== /sys/src/9/pc/ether8139.c
Variable name change to permit compilation.

===== /sys/src/9/bitsy/..., /rc/bin/reboot, /lib/font/bit/lucm/passwd.9.font,
	/sys/src/cmd/factotum/fgui.c and mkfile
Pieces were missing to build bitsy kernel

===== /sys/src/9/pc/devvga.c
Touching ovlctl in cga mode caused crash.

===== /sys/src/9/port/devproc.c
Protect kernel memory from everyone but hostowner.

===== /sys/src/cmd/aux/vga, /sys/src/9/pc/vga*
A number of changes to configure new card variants and one fix to
3dfx.c from Forsyth.
Lots of driver tweaks, especially to vmware, nvidia, voodoo

===== /libndb/common
venti and wiki port defn's omitted from /lib/ndb/common

===== /sys/src/cmd/upas/filterkit/list.c
Fix bug in ! pattern

===== /sys/src/9/port/proc.c
Fix calculation of cpu time in wait system call - old long-standing stupid bug!

===== /sys/src/9/port/devmouse.c
'#m/mousein' now openable only by hostowner.
Also serial mouse support restored.

===== /mail/lib/rewrite.direct /mail/lib/rewrite.gateway
Were missing.

===== /sys/src/9/pc
New plan9.ini entries

	*noetherprobe=
	*nousbprobe=
	pccard0=disabled
	pcmcia0=disabled

documented in plan9.ini(8)

===== /sys/src/9/port/devproc.c,sysproc.c,proc.c,swap.c
"noswap" process control message implemented. (Had been documented
before implementation, a first.)

===== /sys/src/cmd/vnc, /sys/src/cmd/auth/factotum
They now talk to each other.

===== /sys/src/cmd/disk/kfs
When serving 9P on the network can now use factotum to authenticate.

===== /sys/src/cmd/auth/factotum
Can write its own tickets when the auth
server is unavailable (and it has
all the necessary keys).  Thus an auth
server can once again authenticate itself
to a file server at boot time. Thanks to
Forsyth.

===== /sys/src/9/pc/usbuhci.c
Bad data structure in USB device tree slowed down video on some machines,
sometimes spectacularly.

===== /sys/src/cmd/kl
Some tweaks to Sparc compiler (sic) again from Forsyth.

===== /sys/src/cmd/unix/drawterm
drawterm should compile and run on more Linuxes now.
Fixed long-standing error in our assembly for tas x86 gcc.

===== /sys/src/cmd/ndb/dnserver.c, dblookup.c
Fixed ttl for negative soa response

===== /sys/src/9/ip/ip.c
We were not recalculating the ip length field when stripping ip options out.