Fixes #186.

R=ken2
CC=golang-dev
https://golang.org/cl/793041

R=r
CC=golang-dev
https://golang.org/cl/790041

R=gri
CC=golang-dev
https://golang.org/cl/787041

R=r
CC=golang-dev
https://golang.org/cl/786041

TBR=r
CC=golang-dev
https://golang.org/cl/785041

R=gri
CC=golang-dev
https://golang.org/cl/784041

This is a modified version of the open source pprof
from code.google.com/p/google-perftools.
That version is likely to catch up to this one,
but it's still useful to ship our own copy since
we only need the one script from that project,
not all the C++ libraries.

R=r
CC=golang-dev
https://golang.org/cl/783041

eliminate second pass of mark+sweep
by scanning finalizer table specially.

R=r
CC=golang-dev
https://golang.org/cl/782041

Also amend j0.go (variable name conflict, small corrections).

R=rsc
CC=golang-dev
https://golang.org/cl/769041

In this change I'd like to combine the common code that is
present in syscall_darwin.go and syscall_freebsd.go.  I
have three reasons for wanting to do this now:

1. reducing code duplication is nearly always good :-)
2. the duplication will get worse if I duplicate this code
   a third time for the NetBSD port I'm working on, which
   I need to do almost immediately
3. by making this change all in one lump and ignoring any
   commonality with the syscall_linux*.go files the diff
   is long but, I think, readable

In future it may be possible to cherry pick functions that
also apply to Linux and put them in (say) syscall_unix.go,
and of course some functions may diverge in future and have
to move out to OS or architecture specific files, but today
I want just the low hanging fruit.

Tested and passed on:

  Darwin (Snow Leopard, 10.6): amd64 and 386
  FreeBSD (8.0-RELEASE):       386 only(*)

(*) All my virtualisation software has stopped playing nice
with FreeBSD for the moment, so I don't have facilities to
test the amd64 port.  As the OS X port is OK and the diff
looks all right to my eyes I shall keep my fingers crossed.
If someone with a FreeBSD/amd64 system cares to test and
report I would be appreciative.

2010-03-27 update: I have replaced my virtualisation software, and have working FreeBSD/i386 and FreeBSD/amd64 virtual machines again.

As I hoped (and expected -- programmers are optimists :-) the code built and passed all but the two currently known to fail tests on FreeBSD/amd64. I rechecked FreeBSD/i386 too: same results.

R=rsc
CC=golang-dev
https://golang.org/cl/751041

+ first use in go/doc

R=r
CC=golang-dev
https://golang.org/cl/781041

R=rsc
CC=golang-dev
https://golang.org/cl/778041

R=nigeltao_golang, rsc
CC=golang-dev
https://golang.org/cl/759041

R=rsc, gri
CC=golang-dev
https://golang.org/cl/763041

- new heuristic: if both the opening { and closing } braces are on the
  same line, and the function body doesn't contain comments or is other-
  wise too long (e.g. signature too long), it is formatted as a one-line
  function

- related cleanups along the way

- gofmt -w src misc led to no additional changes as expected

R=rsc, rsc1
CC=golang-dev, ken2, r
https://golang.org/cl/758041

R=rsc, gri
CC=golang-dev
https://golang.org/cl/762041

R=ken2
CC=golang-dev
https://golang.org/cl/760042

R=r
CC=golang-dev
https://golang.org/cl/731041

Fixes #639

R=rsc
CC=golang-dev
https://golang.org/cl/755041

R=rsc
CC=golang-dev
https://golang.org/cl/733041

R=r
CC=golang-dev
https://golang.org/cl/715042

test/64bit.go:  segfaults on sheevaplug(armv5)

The following have long runtimes when GC is on.
Sample run time in seconds for android emulator
and sheevaplug
test/stack.go:          4934s   1780s
test/ken/chan.go:        860s    296s
test/gc1.go:             218s     69s

R=rsc, kaib
CC=golang-dev
https://golang.org/cl/749041

R=rsc, r
CC=golang-dev
https://golang.org/cl/739042

R=adg
CC=golang-dev
https://golang.org/cl/744042

R=ken2
CC=golang-dev
https://golang.org/cl/748041

up to date.

No functional change, but when these files are regenerated
they change, leading to noisy diffs when working in the
syscall package.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/705043

R=r
CC=golang-dev
https://golang.org/cl/725042

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/747041

R=rsc
CC=golang-dev
https://golang.org/cl/743041

in the tests, println+panic.
gofmt some tests too.

R=rsc
CC=golang-dev
https://golang.org/cl/741041

- change the various url-xxx formatters to return a relative URL path
- make the leading '/' for URLs explicit in the template
- on the way change some |html formatters to |html-esc
  (html should only be used for formatting AST nodes)

R=rsc, r
CC=golang-dev
https://golang.org/cl/740041

R=rsc, gri, iant, ken2
CC=golang-dev
https://golang.org/cl/738041

(this will allow the use of golang.org for remote
searches)

R=rsc
CC=golang-dev
https://golang.org/cl/734041

R=r
CC=golang-dev
https://golang.org/cl/719041

R=rsc
CC=golang-dev
https://golang.org/cl/661044

R=iant
CC=golang-dev
https://golang.org/cl/720041

no way to get the data out yet.

add prototype for runtime.Callers,
missing from last CL.

R=r
CC=golang-dev
https://golang.org/cl/713041

R=kaib, rsc
CC=golang-dev
https://golang.org/cl/627045

cmd/goinstall: include command name in error reporting (usually missing software or incorrect $PATH)

R=rsc
CC=golang-dev
https://golang.org/cl/695041

Fixes #626.

R=ken2
CC=golang-dev
https://golang.org/cl/714041