Moved the details of how to read a directory
and how to parse the results behind the new
syscall functions ReadDirent and ParseDirent.

Now os needs just one copy of Readdirnames
for the three Unix variants, and it no longer
imports "unsafe".

R=r, r2
CC=golang-dev
https://golang.org/cl/4368048

relationship to os.Process.

R=golang-dev, rsc1
CC=golang-dev
https://golang.org/cl/4384041

TBR=r
CC=golang-dev
https://golang.org/cl/4378042

Not committed to this but it sure makes
the output easier to skim.  With this CL:

$ make
install runtime
install sync/atomic
install sync
install unicode
install utf16
install syscall
install os
...
install ../cmd/govet
install ../cmd/goyacc
install ../cmd/hgpatch
$ make test
test archive/tar
test archive/zip
test asn1
test big
test bufio
...
test path
test path/filepath
TEST FAIL reflect
gotest
rm -f _test/reflect.a
6g -o _gotest_.6 deepequal.go type.go value.go
rm -f _test/reflect.a
gopack grc _test/reflect.a _gotest_.6
all_test.go:210: invalid type assertion: reflect.NewValue(tt.i).(*StructValue) (non-interface type reflect.Value on left)
all_test.go:217: cannot type switch on non-interface value v (type reflect.Value)
all_test.go:218: undefined: IntValue
all_test.go:221: cannot use 132 (type int) as type reflect.Value in function argument
all_test.go:223: cannot use 8 (type int) as type reflect.Value in function argument
all_test.go:225: cannot use 16 (type int) as type reflect.Value in function argument
all_test.go:227: cannot use 32 (type int) as type reflect.Value in function argument
all_test.go:229: cannot use 64 (type int) as type reflect.Value in function argument
all_test.go:231: undefined: UintValue
all_test.go:234: cannot use 132 (type int) as type reflect.Value in function argument
all_test.go:234: too many errors
gotest: "/Users/rsc/g/go/bin/6g -I _test -o _xtest_.6 all_test.go tostring_test.go" failed: exit status 1
make[1]: *** [test] Error 2
make: *** [reflect.test] Error 1

R=r, r2
CC=golang-dev
https://golang.org/cl/4343046

- used to be only for standard log, not for user-built.
- there were no getters.
Also rearrange the code a little so we can avoid allocating
a buffer on every call.  Logging is expensive but we should
avoid unnecessary cost.

This should have no effect on existing code.

R=rsc
CC=golang-dev
https://golang.org/cl/4363045

R=golang-dev, rsc1
CC=golang-dev
https://golang.org/cl/4365041

The CRT is symmetrical in the case of two variables and I picked a
different form from PKCS#1.

R=golang-dev, rsc1
CC=golang-dev
https://golang.org/cl/4381041

Fixes #1107.

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/4374041

R=bradfitz, bradfitzwork
CC=golang-dev
https://golang.org/cl/4368041

This speeds up private key operations by 3.5x (for a 2048-bit
modulus).

R=golang-dev, r, rsc1
CC=golang-dev
https://golang.org/cl/4348053

R=golang-dev, agl1
CC=golang-dev
https://golang.org/cl/4316057

R=agl1
CC=golang-dev
https://golang.org/cl/4346054

R=rsc
CC=golang-dev
https://golang.org/cl/4339055

R=golang-dev, rsc1, r2, bradfitzgo, gri
CC=golang-dev
https://golang.org/cl/4344068

If the command couldn't be found, argv[0] would be wiped.
Also, fix a print statement not to refer to make - it was a vestige of a prior form.

R=rsc, gri
CC=golang-dev
https://golang.org/cl/4360048

R=rsc
CC=golang-dev
https://golang.org/cl/4315050

R=rsc
CC=golang-dev
https://golang.org/cl/4315051

R=rsc, r
CC=golang-dev
https://golang.org/cl/4339054

Fixes #1665.

R=gri
CC=golang-dev
https://golang.org/cl/4351051

R=r, rog
CC=golang-dev
https://golang.org/cl/4364041

Original code by Chris Lennert <cale...@gmail.com>

R=rsc, agl1
CC=golang-dev
https://golang.org/cl/4331054

R=brainman
CC=golang-dev
https://golang.org/cl/4308047

We replace the current Open with:
OpenFile(name, flag, perm) // same as old Open
Open(name) // same as old Open(name, O_RDONLY, 0)
Create(name) // same as old Open(name, O_RDWR|O_TRUNC|O_CREAT, 0666)

This CL includes a gofix module and full code updates: all.bash passes.
(There may be a few comments I missed.)

The interesting packages are:
        gofix
        os
Everything else is automatically generated except for hand tweaks to:
        src/pkg/io/ioutil/ioutil.go
        src/pkg/io/ioutil/tempfile.go
        src/pkg/crypto/tls/generate_cert.go
        src/cmd/goyacc/goyacc.go
        src/cmd/goyacc/units.y

R=golang-dev, bradfitzwork, rsc, r2
CC=golang-dev
https://golang.org/cl/4357052

R=rsc
CC=golang-dev
https://golang.org/cl/4355052

R=rsc
CC=golang-dev
https://golang.org/cl/4363043

Amazon S3 sends Transfer-Encoding "chunked"
on its 404 responses to HEAD requests for
missing objects.

We weren't ignoring the Transfer-Encoding
and were thus interpretting the subsequent
response headers as a chunk header from the
previous responses body (but a HEAD response
can't have a body)

R=rsc, adg
CC=golang-dev
https://golang.org/cl/4346050

A connection shouldn't be made available
for re-use until its body has been consumed.

(except in the case of pipelining, which isn't
implemented yet)

This CL fixes some issues seen with heavy load
against Amazon S3.

Subtle implementation detail: to prevent a race
with the client requesting a new connection
before previous one is returned, we actually
have to call putIdleConnection _before_ we
return from the final Read/Close call on the
http.Response.Body.

R=rsc, adg
CC=golang-dev
https://golang.org/cl/4351048

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/4315049

R=golang-dev, rsc1, peterGo, bsiegert, r, mattn
CC=golang-dev
https://golang.org/cl/4271057

The transport readLoop was waiting forever for the client to
read the non-existent body before proceeding to read the next
request.

R=rsc
CC=golang-dev
https://golang.org/cl/4357051

R=r, r2, rsc1, rsc, jacek.masiulaniec
CC=golang-dev
https://golang.org/cl/4344062

TBR=r
CC=golang-dev
https://golang.org/cl/4351047

The error will only occur for invalid patterns, but without this
error path there is no way to know that Glob has failed due to
an invalid pattern.

R=rsc
CC=golang-dev
https://golang.org/cl/4346044

Write never writes less than the buffer size and WriteString takes advantage
of the copy built-in to improve write efficiency.

R=rsc, ality, rog
CC=golang-dev
https://golang.org/cl/4344060

According to RFC 3986: "For consistency, URI producers
and normalizers should use uppercase hexadecimal digits
for all percent-encodings."  Using lower case characters
makes it incompatible with Google APIs when signing OAuth requests.

R=golang-dev, rsc1, rsc
CC=golang-dev
https://golang.org/cl/4352044

R=golang-dev, r2
CC=golang-dev, mrjones
https://golang.org/cl/4348048

R=r
CC=golang-dev
https://golang.org/cl/4353047

Fixes #1637.

R=rsc, rh, msolo
CC=golang-dev
https://golang.org/cl/4317049

R=rsc
CC=golang-dev
https://golang.org/cl/4331050

Enables the use of https servers in tests.

R=agl, rsc, agl1
CC=golang-dev
https://golang.org/cl/4284063