This CL continues with introducing IPv6 scoped addressing capability
into the net package.

Update #4234.

R=rsc
CC=golang-dev
https://golang.org/cl/6842053

Fixes #4448.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6855100

Package format is a utility package that takes care of
parsing, sorting of imports, and formatting of .go source
using the canonical gofmt formatting parameters.

Use go/format in various clients instead of the lower-level components.

R=r, bradfitz, dave, rogpeppe, rsc
CC=golang-dev
https://golang.org/cl/6852075

Garbage collection code (to be merged later) is calling functions
which have many local variables. This increases the probability that
the stack capacity won't be big enough to hold the local variables.
So, start gc() on a bigger stack to eliminate a potentially large number
of calls to runtime·morestack().

R=rsc, remyoudompheng, dsymonds, minux.ma, iant, iant
CC=golang-dev
https://golang.org/cl/6846044

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/6854103

As discussed in issue 2672 and on golang-nuts, this CL adds a Split() method
to regexp. It is based on returning the "opposite" of FindAllString() so that
the returned substrings are everything not matched by the expression.

See: https://groups.google.com/forum/?fromgroups=#!topic/golang-nuts/xodBZh9Lh2E

Fixes #2762.

R=remyoudompheng, r, rsc
CC=golang-dev
https://golang.org/cl/6846048

Fix suggested by serbaut.

Fixes #4445.

R=sameer
CC=golang-dev, serbaut
https://golang.org/cl/6842102

Update #4125

R=minux.ma, rsc
CC=golang-dev
https://golang.org/cl/6847107

The syslog implementation was not correctly implementing the
traditional syslog format because it had a confused notion of
'priority'.  syslog priority is not a single number but is, in
fact, the combination of a facility number and a severity. The
previous Go syslog implementation had a single Priority that
appeared to be the syslog severity and no way of setting the
facility.  That meant that all syslog messages from Go
programs appeared to have a facility of 0 (LOG_KERN) which
meant they all appeared to come from the kernel.

Also, the 'prefix' was in fact the syslog tag (changed the
internal name for clarity as the term tag is more widely used)
and the timestamp and hostname values were missing from
messages.

With this change syslog messages are generated in the correct
format with facility and severity combined into a priority,
the timestamp in RFC3339 format, the hostname, the tag (with
the PID in [] appened) and the message.

The format is now:

   <PRI>1 TIMESTAMP HOSTNAME TAG[PID]: MSG

The TIMESTAMP, HOSTNAME and PID fields are filled in
automatically by the package. The TAG and the MSG are supplied
by the user. This is what rsyslogd calls TraditionalFormat and
should be compatible with multiple systems.

R=rsc, jgc, 0xjnml, mikioh.mikioh, bradfitz
CC=golang-dev
https://golang.org/cl/6782118

R=golang-dev, remyoudompheng, rsc
CC=golang-dev
https://golang.org/cl/6525052

The test failed on one of the builders with:
timeout_test.go:594: 	ln.Accept: accept tcp 127.0.0.1:19373: use of closed network connection
http://build.golang.org/log/e83f4a152b37071b9d079096e15913811ad296b5

R=golang-dev, bradfitz, dave, mikioh.mikioh, remyoudompheng, rsc
CC=golang-dev
https://golang.org/cl/6859043

This CL defines the API. Implementation will come in follow-up CLs.

Update #1960.

R=bradfitz, dr.volker.dobler, rsc
CC=golang-dev
https://golang.org/cl/6849092

Part of merging goprotobuf's A+C into Go's.

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/6844096

It's better to use IsValid() then checking a (possibly
partially set up) position against NoPos directly.

R=dsymonds
CC=golang-dev
https://golang.org/cl/6855099

R=golang-dev, minux.ma, bradfitz
CC=golang-dev
https://golang.org/cl/6844088

The API additions to syscall are in dir_plan9.go.

R=seed, rsc, rminnich, mirtchovski, dave
CC=golang-dev, lucio.dere
https://golang.org/cl/6157045

This allows 5g and 8g to benefit from the rewrite as shifts
or magic multiplies. The 64-bit arithmetic is not handled there,
and left in 6g.

Update #2230.

R=golang-dev, dave, mtj, iant, rsc
CC=golang-dev
https://golang.org/cl/6819123

Fixes 386 build breakage.

R=rsc
CC=golang-dev
https://golang.org/cl/6844091

Thanks to Dustin Sallings for exposing the most frustrating
bug ever, and for providing repro cases (which formed the
basis of the new tests in this CL), and to Dave Cheney and
Dmitry Vyukov for help debugging and fixing.

This CL depends on submited pollster CLs ffd1e075c260 (Unix)
and 14b544194509 (Windows), as well as unsubmitted 6852085.
Some operating systems (OpenBSD, NetBSD, ?) may still require
more pollster work, fixing races (Issue 4434 and
http://goo.gl/JXB6W).

Tested on linux-amd64 and darwin-amd64, both with GOMAXPROCS 1
and 4 (all combinations of which previously failed differently)

Fixes #4191
Update #4434 (related fallout from this bug)

R=dave, bradfitz, dsallings, rsc, fullung
CC=golang-dev
https://golang.org/cl/6851061

Bools from comparisons can be assigned to all bool types, but this idealness would propagate through logical operators when the result should have been lowered to a non-ideal form.

Fixes #3924.

R=golang-dev, remyoudompheng, r, rsc, mtj
CC=golang-dev
https://golang.org/cl/6855061

Cleanups introduced originally by now abandoned
https://golang.org/cl/6846078/ .

Includes additional test cases for 'if' and 'for'
statements.

No formatting changes.

R=rsc
CC=golang-dev
https://golang.org/cl/6855096

Also: Can set base indentation in printer.Config: all code
is going to be indented by at least that amount (except for
raw string literals spanning multiple lines, since their
values must not change).

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6847086

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6849105

The stack overflow checker in the linker uses the spadj field
to determine whether stack space will be large enough or not.
When spadj=0, the checker treats the function as a nosplit
and emits an error although the program is correct.

Also enable the stack checker in 8l.

Fixes #4316.

R=rsc, golang-dev
CC=golang-dev
https://golang.org/cl/6855088

also:

- composite literal checking close to complete
- cleaned up parameter, method, field checking
- don't let panics escape type checker
- more TODOs eliminated

R=rsc
CC=golang-dev
https://golang.org/cl/6816083

Since p.M is rejected (must call methods), use p.M(),
to keep the examples compiling.

Fixes #4441.

R=gri
CC=golang-dev
https://golang.org/cl/6854096

The 8l linker automatically inserts XCHG instructions
to support otherwise impossible byte registers
(only available on AX, BX, CX, DX).

Sometimes AX or DX is needed (for MUL and DIV) so
we need to avoid clobbering them.

R=golang-dev, dave, iant, iant, rsc
CC=golang-dev
https://golang.org/cl/6846057

Update #4415.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6856080

This requires rebasing the block-mode test scripts.
I used GnuTLS version 3.1.4.

R=agl
CC=golang-dev
https://golang.org/cl/6844073

Currently the test exposes data races on deadline vars.

R=golang-dev, dave, bradfitz, rsc
CC=golang-dev
https://golang.org/cl/6845091

R=golang-dev
CC=golang-dev
https://golang.org/cl/6856097

Fixes #4424.
Fixes #4425.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6849093

Fixes #4429.

R=golang-dev, remyoudompheng, daniel.morsing, rsc
CC=golang-dev
https://golang.org/cl/6850097

Fixes #4402.

R=remyoudompheng, shivakumar.gn, random0x00, rsc
CC=golang-dev
https://golang.org/cl/6842063

Failed with gccgo.

R=golang-dev, remyoudompheng, rsc
CC=golang-dev
https://golang.org/cl/6855053

add necessary newlines.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6847067

This CL starts to introduce IPv6 scoped addressing capability
into the net package.

The Public API changes are:
+pkg net, type IPAddr struct, Zone string
+pkg net, type IPNet struct, Zone string
+pkg net, type TCPAddr struct, Zone string
+pkg net, type UDPAddr struct, Zone string

Update #4234.

R=rsc, bradfitz, iant
CC=golang-dev
https://golang.org/cl/6849045

R=minux.ma, jsing
CC=golang-dev
https://golang.org/cl/6855080

while we're at it, also fix a return value stutter in ParseForm.

R=bradfitz
CC=golang-dev
https://golang.org/cl/6847074

R=golang-dev, bradfitz, minux.ma, dave
CC=golang-dev
https://golang.org/cl/6842081