This CL changes both JoinGroup and LeaveGroup methods
to take an interface as an argument for enabling IPv6
group address join/leave, join a group address on a
specific interface.

R=rsc, dave
CC=golang-dev
https://golang.org/cl/4815074

Allocate Defer on stack during cgo calls, as suggested
by dvyukov. Also includes some comment corrections.

benchmark                   old,ns/op   new,ns/op
BenchmarkCgoCall                  669         330
(Intel Xeon CPU 1.80GHz * 4, Linux 386)

R=dvyukov, rsc
CC=golang-dev
https://golang.org/cl/4910041

They are used internally and do not appear in the final parse tree.

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/4905052

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/4867060

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/4914042

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/4887048

I converted this program yesterday and the output is the
same as it used to be, ignoring space, but the result is
not the best expression of the algorithm.  The old {.section
Maybe} pieces are now {{with .Maybe}}, as a direct translation,
but I they should be {{if .Maybe}} as the output is just a
bool and there is no cascading.

I have verified that the output of the program is unaffected.

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/4889053

R=golang-dev, dsymonds, jnwhiteh, n13m3y3r, gustavo
CC=golang-dev
https://golang.org/cl/4837051

R=golang-dev, dsymonds, adg
CC=golang-dev
https://golang.org/cl/4907049

This defines just enough context to distinguish HTML URI attributes
from parsed character data.

It does not affect any public module API as I thought I would get
early comment on style for defining enumerations and tables.

R=rsc, r, nigeltao, r
CC=golang-dev
https://golang.org/cl/4906043

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/4897048

Use naming convention for template variables
to indicate "escaped-ness" for easier reviewing.
(per suggestion from bradfitz)

R=bradfitz
CC=golang-dev
https://golang.org/cl/4914041

R=gri
CC=golang-dev
https://golang.org/cl/4644052

The spec has defined nil chans this way for months.
I'm behind.

R=ken2
CC=golang-dev
https://golang.org/cl/4897050

The spec has defined nil maps this way for months.
I'm behind.

R=ken2
CC=golang-dev
https://golang.org/cl/4901052

Broken by Plan 9 changes.

R=ken2
CC=golang-dev
https://golang.org/cl/4896050

R=rsc
CC=golang-dev
https://golang.org/cl/4908047

All tests enabled by default passes except those in timeout_test.go.

For TestLookupPort, add an entry for "bootps" in /lib/ndb/common
(Plan 9 calls it "bootp"). I've sent out a patch to fix this.

R=paulzhol, rsc, mikioh.mikioh
CC=ality, golang-dev
https://golang.org/cl/4779041

- Resolves a long-standing TODO.
- Replacement for CL 4908042 by befelemepeseveze@gmail.com

Fixes #2155.

R=rsc
CC=golang-dev
https://golang.org/cl/4904048

Fixes #2150.

R=golang-dev, nigeltao, rsc
CC=golang-dev
https://golang.org/cl/4890042

Also improve error message for unsupported integer types

R=agl, rsc
CC=golang-dev
https://golang.org/cl/4873049

forminfo.go:
- Wrappers for table data.
- Per Form dispatch table.
composition.go:
- reorderBuffer type.  Implements decomposition, reordering, and composition.
- Note: decompose and decomposeString fields in formInfo could be replaced by
  a pointer to the trie for the respective form.  The proposed design makes
  testing easier, though.
normalization.go:
- Temporarily added panic("not implemented") methods to make the tests run.
  These will be removed again with the next CL, which will introduce the
  implementation.

R=r, rogpeppe, mpvl, rsc
CC=golang-dev
https://golang.org/cl/4875043

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/4911041

Replaces the toy func Reverse(*Template) with one that implements
naive autoescaping.

Now Escape(*Template) walks a template parse tree to find all
template actions and adds the |html command to them if it is not
already present.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/4867049

R=gri, r, rsc
CC=golang-dev
https://golang.org/cl/4891041

(Leave exp/template/html where it is for now.)

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/4899048

It's already in old/template; make that build.
Update a couple of references to point to the old template.
They can be updated later.
Update goplay to use exp/template.

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/4902046

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/4876057

This is just moving the URL code from package http into its own package,
which has been planned for a while.
Besides clarity, this also breaks a nascent dependency cycle the new template
package was about to introduce.

Add a gofix module, url, and use it to generate changes outside http and url.

Sadness about the churn, gladness about some of the naming improvements.

R=dsymonds, bradfitz, rsc, gustavo, r
CC=golang-dev
https://golang.org/cl/4893043

Fixes #2148.

R=golang-dev, bradfitz, rsc
CC=golang-dev
https://golang.org/cl/4905042

Fixes #2156.

R=rsc
CC=golang-dev
https://golang.org/cl/4899046

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/4901047

Add multicast stubs and sync with recent changes.

R=golang-dev, mikioh.mikioh
CC=golang-dev
https://golang.org/cl/4838058

Multicast address handling is not consistent across all BSDs. Move
the multicast address handling code into OS dependent files. This
will be needed for OpenBSD support.

R=mikioh.mikioh, golang-dev
CC=golang-dev
https://golang.org/cl/4809074

Fixes #2127.

R=rsc
CC=golang-dev
https://golang.org/cl/4873043

The corruption can occur when GOMAXPROCS
is changed from >1 to 1, since GOMAXPROCS=1
does not imply there is only 1 goroutine running,
other goroutines can still be not parked after
the change.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/4873050

When the C API being used includes multiple names for the same
underlying symbol (e.g. multiple #define's for the same variable), then
cgo will generate the same placeholder variables for each name.  This
then prevents the code from compiling due to multiple declarations of
the same variable - so change cgo to only create one instance of the
variable for the underlying symbol.

R=rsc
CC=golang-dev
https://golang.org/cl/4826055

R=golang-dev
CC=golang-dev, rsc
https://golang.org/cl/4837044

src/cmd/5c/reg.c:
. Added USED() attribute.

src/cmd/6c/cgen.c:
. Revised code around "REGARG" to resemble use in "8c" and
  consequently remove a warning.

src/cmd/6l/asm.c:
. Added USED() attributes.
. Removed an unnecessary assignment.

R=golang-dev
CC=golang-dev, rsc
https://golang.org/cl/4836045

R=golang-dev
CC=golang-dev, rsc
https://golang.org/cl/4835043