scanner.Position is the position of the most recently
scanned token. Make sure it is invalid if there is no
token scanned and update corresponding comment. This
is particularly important when reporting errors.

Fixes #2371.

R=r
CC=golang-dev
https://golang.org/cl/5294041

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5285042

Had been allowing it for use by fmt, but it is too hard to lock down.
Fix other packages not to depend on it.

R=r, r
CC=golang-dev
https://golang.org/cl/5266054

Previously, Next would call either nextText or nextTag, but nextTag
could also call nextText. Both nextText and nextTag were responsible
for detecting "</a" end tags and "<!" comments. This change simplifies
the call chain and puts that responsibility in a single place.

R=andybalholm
CC=golang-dev
https://golang.org/cl/5263050

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5286049

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5266046

Fixes #2377.

R=r, rsc
CC=golang-dev
https://golang.org/cl/5267048

R=golang-dev, r, rsc
CC=golang-dev
https://golang.org/cl/5272045

Fixes #2376

R=golang-dev, lvd, rsc
CC=golang-dev
https://golang.org/cl/5278048

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5284050

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5268048

Address the issue coalescing two records together when TrimLeadingSpace
is set to true.

The input

        a,b,
        c,d,e

Would result with a singled a,b,c,d,e record.
With TrailingComma set to true it should give two records.
With TrailingComma set to false it should be an error.

Fixes #2366.

R=golang-dev, go.peter.90, r
CC=golang-dev
https://golang.org/cl/5284046

Fixes #2375.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5279049

Uses a generic solution of renaming the tested package, instead of
using cryptic names for all other imports, variables and methods
in the generated _testmain.go file.

Fixes #2346.

R=golang-dev, r, adg
CC=golang-dev, rsc
https://golang.org/cl/5254061

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/5275050

R=andybalholm
CC=golang-dev
https://golang.org/cl/5284042

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5284044

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5286047

New DLL and Proc types to manage and call dll functions. These were
used to simplify syscall tests in runtime package. They were also
used to implement LazyDLL and LazyProc.

LazyProc, like Proc, now have Call function, that just a wrapper for
SyscallN. It is not as efficient as Syscall, but easier to use.

NewLazyDLL now supports non-ascii filenames.

LazyDLL and LazyProc now have Load and Find methods. These can be used
during runtime to discover if some dll functions are not present.

All dll functions now return errors that fit os.Error interface. They
also contain Windows error number.

Some of these changes are suggested by jp.

R=golang-dev, jp, rsc
CC=golang-dev
https://golang.org/cl/5272042

R=nigeltao
CC=golang-dev
https://golang.org/cl/5279044

Previously, if an http.Handler didn't fully consume a
Request.Body before returning and the request and the response
from the handler indicated no reason to close the connection,
the server would read an unbounded amount of the request's
unread body to advance past the request message to find the
next request's header. That was a potential DoS.

With this CL there's a threshold under which we read
(currently 256KB) in order to keep the connection in
keep-alive mode, but once we hit that, we instead
switch into a "Connection: close" response and don't
read the request body.

Fixes #2093 (along with number of earlier CLs)

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/5268043

The current code will panic if an invalid
request (one with a nil URL) is passed to
the doFollowingRedirects function.

Also, remove a redundant nil Header check.

R=bradfitz
CC=golang-dev
https://golang.org/cl/5270046

R=adg
CC=golang-dev
https://golang.org/cl/5273044

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/5273043

Also, add golden output data for linux/arm.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5256041

When xml.Marshal is called on a struct it will happily
reflect the information in the "tag" of an XMLName member
regardless of the type to give the struct a tag-name in
it's XML form. This is backed up by the documentation which
says:

However xml.Unmarshal *does* care about the XMLName field
being of type xml.Name, and currently returns the error
"field XMLName does not have type xml.Name" if you have it
set to something else.

This is firstly inconsistant with xml.Marshal but it also
makes it impossible to use xml.Marshal alongside other
Marshallers (like json/bson) without poluting the state's
namespace with XMLName fields. Inorder to exclude fields
from other Marshallers the convention has been started to
tag fields as "omitempty"; which will cause the field not
to display if it is at it's "zero" state, XMLName cannot
have such as zero-state since it is a struct, so it is nicer
to use a pointer/bool value for XMLName so it can be easily
excluded when I want to Marshal my struct by some other
wire format.

Attached is the proposed minor change, that simply stops
erring if it can't set the name on the XMLName field, which
is just optional metadata anyway.
Fixes #2265.

R=rsc
CC=golang-dev
https://golang.org/cl/5067044

Fixes #2146

R=rsc
CC=golang-dev
https://golang.org/cl/5284041

Fixes #2369.

R=gri
CC=golang-dev
https://golang.org/cl/5275048

Apparently some versions of bash do the ||exit implicitly
when in set -e mode, but others do not.  ???

R=gri
CC=golang-dev
https://golang.org/cl/5285043

http://code.google.com/p/go/issues/detail?id=1899

R=rsc, alex.brainman, bsiegert, hectorchu, bradfitz
CC=golang-dev
https://golang.org/cl/4978047

We also have functions for dealing with PKCS#1 private keys. This
change adds functions for PKIX /public/ keys. Most of the time one
won't be parsing them because they usually come in certificates, but
marshaling them happens and I've previously copied the code from
x509.go for this.

R=bradfitz, rsc
CC=golang-dev
https://golang.org/cl/5286042

X509 names, like everything else X509, are ludicrously general. This
change keeps the raw version of the subject and issuer around for
matching. Since certificates use a distinguished encoding, comparing
the encoding is the same as comparing the values directly. This came
up recently when parsing the NSS built-in certificates which use the
raw subject and issuer for matching trust records to certificates.

R=bradfitz
CC=golang-dev
https://golang.org/cl/5275047

R=bradfitz
CC=golang-dev
https://golang.org/cl/5172042

Fixes #2057

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5269044

Firefox Websocket implementation send a "Connection: keep-alive, upgrade"
header during the handshake (and as descripted on the last hybi draft
the "Connection" header must include, but doesn't need to be equal to,
"upgrade":

   '4. A "Connection" header field that includes the token "Upgrade",
    treated as an ASCII case-insensitive value.'

From:
http://tools.ietf.org/html/draft-ietf-hybi-thewebsocketprotocol-17#page-23

R=golang-dev, ukai, cw, rsc
CC=golang-dev
https://golang.org/cl/5233059

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5274045

Adjust goyacc.go to produce code that is gofmt-compliant whenever it is easy to do so. Also changed two lines in cpyact that appeared to be bugs.

Also updated units.y to remove a few other errors.

After this change, units.go has only two style errors: an extra newline at the top of the file, and yys misaligned in yySymType.

R=rsc
CC=golang-dev
https://golang.org/cl/5265047

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5284043

This test fails for me on Windows 7 64-bit non-Admin.

R=golang-dev, rsc, krautz
CC=golang-dev
https://golang.org/cl/5276048

R=alex.brainman, hectorchu, rsc
CC=golang-dev
https://golang.org/cl/5263045