remove explicit linking in make files

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/4629051

R=golang-dev, dsymonds, r
CC=golang-dev
https://golang.org/cl/4638046

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/4627047

(Variable is referred to alternately as 'r' and 'req')

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/4648042

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/4639046

R=ken2
CC=golang-dev
https://golang.org/cl/4635051

R=ken2
CC=golang-dev
https://golang.org/cl/4640045

R=ken2
CC=golang-dev
https://golang.org/cl/4627045

Remove now-unnecessary zeroing of stack frames.

R=ken2
CC=golang-dev
https://golang.org/cl/4641044

R=ken2
CC=golang-dev
https://golang.org/cl/4646042

R=gri, r, r
CC=golang-dev
https://golang.org/cl/4631045

R=gri
CC=golang-dev
https://golang.org/cl/4625044

R=adg
CC=golang-dev
https://golang.org/cl/4643045

R=lucio.dere, vcc.163, bradfitz
CC=golang-dev
https://golang.org/cl/4645044

R=dsymonds
CC=golang-dev
https://golang.org/cl/4648041

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/4643044

Fixes #1962.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/4636044

package name.

R=r, rsc
CC=golang-dev
https://golang.org/cl/4630042

R=r, r
CC=golang-dev
https://golang.org/cl/4630041

R=golang-dev, mattn.jp, adg
CC=golang-dev
https://golang.org/cl/4634043

Fixes #1961

R=golang-dev, rsc, r
CC=golang-dev
https://golang.org/cl/4633045

R=r, r
CC=golang-dev
https://golang.org/cl/4571074

Previously Request and Response had redundant fields for
Referer, UserAgent, and cookies which caused confusion and
bugs.  It also didn't allow us to expand the package over
time, since the way to access fields would be in the Headers
one day and promoted to a field the next day.  That would be
hard to gofix, especially with code ranging over Headers.

After a discussion on the mail package's design with a similar
problem, we've designed to make the Headers be the source of
truth and add accessors instead.

Request:
change: Referer -> Referer()
change: UserAgent -> UserAgent()
change: Cookie -> Cookies()
new: Cookie(name) *Cookie
new: AddCookie(*Cookie)

Response:
change: Cookie -> Cookies()

Cookie:
new: String() string

R=rsc
CC=golang-dev
https://golang.org/cl/4620049

Attributes without value are commen in html and the xml
parser will accept them in non-strict mode and use the
attribute name as value. Thus parsing <p nowrap> as
<p norwar="nowrap">.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/4601053

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/4589055

It was always a weird interface but I didn't know what I
was doing at the time.  rsc questioned me about it then
but didn't press on it during review.  Then adg bugged me
about it too recently.

So clean it up. It parallels the Writer struct too.

R=golang-dev, r, rsc
CC=golang-dev
https://golang.org/cl/4602063

Correct a few error messages (libcgo -> runtime/cgo)
and delete old nacl_386.c file too.

Fixes #1657.

R=iant
CC=golang-dev
https://golang.org/cl/4603057

I missed this before because I used the wrong regexp. What a moron.

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/4639041

R=adg
CC=golang-dev
https://golang.org/cl/4638041

R=adg
CC=golang-dev
https://golang.org/cl/4637042

Communications op was listed as a binary; it isn't any more.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/4637041

R=adg, r
CC=golang-dev
https://golang.org/cl/4627042

R=ken2
CC=golang-dev
https://golang.org/cl/4632041

No impact on existing sources under src, misc.

Fixes #1959.

R=r, rsc, r
CC=golang-dev
https://golang.org/cl/4589056

R=ken2
CC=golang-dev
https://golang.org/cl/4629042

Avoids buggy version of egrep on some Macs.

R=r, dsymonds
CC=golang-dev
https://golang.org/cl/4603056

See https://golang.org/cl/4572045/

R=adg, rsc
CC=golang-dev
https://golang.org/cl/4627041

R=r
CC=golang-dev
https://golang.org/cl/4622041

R=golang-dev, bradfitz, rsc
CC=golang-dev
https://golang.org/cl/4609047

I don't think we've discussed this API enough.

««« original CL description
bike/shed: new package.

It comes up often enough that it's time to provide
the utility of a standard package.

R=r, mirtchovski, adg, rsc, n13m3y3r, ality, go.peter.90, lstoakes, iant, jan.mercl, bsiegert, robert.hencke, rogpeppe, befelemepeseveze, kevlar
CC=golang-dev
https://golang.org/cl/4557047
»»»

R=dsymonds, bradfitz, gri
CC=golang-dev
https://golang.org/cl/4576065