8l, runtime: place G and M pointers relative to _tos on Plan 9, instead of hardcoded values for USTKTOP.

This should allow executing both on native Plan 9 and inside 9vx.

R=rsc
CC=golang-dev
https://golang.org/cl/3993044

Fixes #1498.

R=golang-dev, mattn, r, rsc
CC=golang-dev
https://golang.org/cl/4140041

Now that packet/ is checked in, we can add its Makefile. Also, a couple
of updates to error/ and s2k/ for bugfixes and to use the new crypto
package.

R=bradfitzgo
CC=golang-dev
https://golang.org/cl/4179043

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/4174045

R=r
CC=golang-dev
https://golang.org/cl/4182043

(The unittest for Signature may seem a little small, but it's tested by
the higher level code.)

R=bradfitzgo
CC=golang-dev
https://golang.org/cl/4173043

One more case.

R=r, r2
CC=golang-dev
https://golang.org/cl/4170044

R=gri
CC=golang-dev
https://golang.org/cl/4129046

This change is to make these apis similar to their unix counterparts.

R=rsc
CC=golang-dev
https://golang.org/cl/4185042

R=rsc
CC=golang-dev
https://golang.org/cl/4172041

Should fix windows/386 build.

R=brainman
CC=golang-dev
https://golang.org/cl/4170041

R=r
CC=golang-dev
https://golang.org/cl/4128060

R=r, r2
CC=golang-dev
https://golang.org/cl/4187041

Fixes #1488.

R=r, rsc, rog
CC=golang-dev
https://golang.org/cl/4168043

R=golang-dev, brainman, mattn, rsc
CC=golang-dev
https://golang.org/cl/4001058

R=bradfitzgo
CC=golang-dev
https://golang.org/cl/4156044

R=brainman, lxn, rsc
CC=golang-dev
https://golang.org/cl/4126056

R=gri
CC=golang-dev
https://golang.org/cl/4169044

R=r
CC=golang-dev
https://golang.org/cl/4176042

R=r
CC=golang-dev
https://golang.org/cl/4169043

- guard some calls to Write that frequently may have 0-length data
- fix an invariant

R=r
CC=golang-dev
https://golang.org/cl/4179041

In line with other functions such as Fprintf, put the
thing to be written first.

Apologies for the breakages this is sure to cause.

R=rsc, gri, adg, eds, r2, aam
CC=golang-dev
https://golang.org/cl/4169042

This functionality was removed with CL 4169041.

Minor simplifications.

R=r, adg
CC=golang-dev
https://golang.org/cl/4171042

R=r
CC=golang-dev
https://golang.org/cl/4173041

this will break the build, but it's already silently broken.

R=rsc
CC=golang-dev
https://golang.org/cl/4168041

R=gri, adg
CC=golang-dev
https://golang.org/cl/4169041

BSD and Darwin require an extra page between
end and the first mapping, and Windows has various
memory in the way too.

Fixes #1464.

R=r, r2
CC=golang-dev
https://golang.org/cl/4167041

Do not reserve virtual address space.
Instead, assume it will be there when we need it,
and crash loudly if that assumption is violated.
Reserving the address space gets charged to
ulimit -v, which exceeds commonly set limits.

http://groups.google.com/group/golang-dev/msg/7c477af5f5a8dd2c

R=r, niemeyer
CC=golang-dev
https://golang.org/cl/4148045

Avoids problems running Linux binaries under QEMU.

R=r, gri
CC=golang-dev
https://golang.org/cl/4151043

Add Error type to enable clients to distinguish
between local and remote errors.
Also return "connection shut down error" after
the first error return rather than returning the
same error each time.

R=r
CC=golang-dev
https://golang.org/cl/4080058

Neither gofmt nor godoc are making use of a Styler (for
token-specific formatting) anymore. Stylers interacted in complicated
ways with HTML-escaping which was why the printer needed an HTML mode
in the first place.

godoc now uses a more powerful and general text formatting
function that does HTML escaping, text selection, and can
handle token-specific formatting if so desired (currently
used only for comments).

As a consequence, cleaned up uses of go/printer in godoc;
simplified the various write utility functions, and also
removed the need for the "html" template format (in favor of
html-esc which now does the same and is used more pervasively).

Applied gofmt -w src misc to verify no changes occured,
and tested godoc manually.

There should be no visible changes except that (type) code
snippets presented for godoc package documentation now
uses the same formatting as for general source code and
thus comments get the comment-specific color here as well
(not the case at the moment).

(TODO: godoc needs a good automatic test suite).

R=rsc
CC=golang-dev
https://golang.org/cl/4152042

R=golang-dev, r, rsc
CC=golang-dev
https://golang.org/cl/4130047

R=rsc
CC=golang-dev
https://golang.org/cl/4128061

Even if local, it requires communication with a daemon
which may not be available.  This is creating problems
for getting an Ubuntu package going in Launchpad's PPA.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/3989062

Structs defined in C as containing a field with
an enum type are currently translated to Go as
a struct with an unsigned integer field, even if
some of the values contained in the enum are
negative.

This modification takes in consideration the values
defined in the enum, and conditionally defines the
Go type as signed if necessary.

The logic introduced was tested with gcc, which
will increase the type size if it contains both
negative numbers and values greater than 2^b/2-1,
and refuses to compile values which would be
problematic (2^64-1, but in fact the ISO C
restricts the range to the size of int).

R=rsc
CC=golang-dev
https://golang.org/cl/4119058

Fixes #716

This CL simply resumes the previous CL in-flight at
https://golang.org/cl/906042/

R=rsc, petar-m, dsymonds
CC=golang-dev
https://golang.org/cl/4157042

Faster in most cases, and not prone to memory leaks. Named "Do" to match with similarly named method on Vector.

R=gri
CC=golang-dev
https://golang.org/cl/4134046

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/4158043

TBR=r
CC=golang-dev
https://golang.org/cl/4151042

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/4145046