files moved from misc/windows, bash packager file replaced with Windows batch file

R=golang-dev, alex.brainman, rsc
CC=golang-dev
https://golang.org/cl/5677074

1, strip last path separator from $GOROOT
   The user might define GOROOT=/path/to/go/, but then the dir
   check in defaulttarg() will always complain the current dir
   is not within $GOROOT/src/.
2, resolve symlinks in the default goroot
   Or if getcwd() returns a fully-resolved path, the check in
   defaulttarg() will always fail.

R=rsc
CC=golang-dev
https://golang.org/cl/5649073

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5673081

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5677076

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5671081

R=golang-dev, r, rsc, remyoudompheng, r
CC=golang-dev
https://golang.org/cl/5674086

The panic happens if -benchtime flag is specified:
go test -bench=EndToEndAsyncHTTP -benchtime=120

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5677075

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/5656084

Fixes #2778.

R=bradfitz, rsc, iant, adg
CC=golang-dev
https://golang.org/cl/5672078

X ,s;^// \$G (\$D/)?\$F\.go *$;// compile;g
X ,s;^// \$G (\$D/)?\$F\.go && \$L \$F\.\$A *$;// build;g
X ,s;^// \$G (\$D/)?\$F\.go && \$L \$F\.\$A && \./\$A\.out *$;// run;g
X ,s;^// errchk \$G( -e)? (\$D/)?\$F\.go *$;// errorcheck;g

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5671080

X ,s;^// \$G (\$D/)?\$F\.go *$;// compile;g
X ,s;^// \$G (\$D/)?\$F\.go && \$L \$F\.\$A *$;// build;g
X ,s;^// \$G (\$D/)?\$F\.go && \$L \$F\.\$A && \./\$A\.out *$;// run;g
X ,s;^// errchk \$G( -e)? (\$D/)?\$F\.go *$;// errorcheck;g

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5673079

X ,s;^// \$G (\$D/)?\$F\.go *$;// compile;g
X ,s;^// \$G (\$D/)?\$F\.go && \$L \$F\.\$A *$;// build;g
X ,s;^// \$G (\$D/)?\$F\.go && \$L \$F\.\$A && \./\$A\.out *$;// run;g
X ,s;^// errchk \$G( -e)? (\$D/)?\$F\.go *$;// errorcheck;g

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5656083

X ,s;^// \$G (\$D/)?\$F\.go *$;// compile;g
X ,s;^// \$G (\$D/)?\$F\.go && \$L \$F\.\$A *$;// build;g
X ,s;^// \$G (\$D/)?\$F\.go && \$L \$F\.\$A && \./\$A\.out *$;// run;g
X ,s;^// errchk \$G( -e)? (\$D/)?\$F\.go *$;// errorcheck;g

R=golang-dev
CC=golang-dev
https://golang.org/cl/5673078

X ,s;^// \$G (\$D/)?\$F\.go *$;// compile;g
X ,s;^// \$G (\$D/)?\$F\.go && \$L \$F\.\$A *$;// build;g
X ,s;^// \$G (\$D/)?\$F\.go && \$L \$F\.\$A && \./\$A\.out *$;// run;g
X ,s;^// errchk \$G( -e)? (\$D/)?\$F\.go *$;// errorcheck;g

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5656082

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5676077

Convert cryptotype to general go1rename fix.
Add os.Exec -> syscall.Exec fix along with new
URL fixes.

Fixes #2946.

R=golang-dev, r, dsymonds
CC=golang-dev
https://golang.org/cl/5672072

R=bradfitz
CC=golang-dev
https://golang.org/cl/5676076

Fixes #2583.

R=rsc, r
CC=golang-dev
https://golang.org/cl/5671078

Fixes #3037.

R=rsc, minux.ma, r, rsc
CC=golang-dev
https://golang.org/cl/5674072

Shows error handling and slices for Read and Write.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5676075

We want to be able to implement good Windows support
after Go 1.  Right now Windows tries to use Unix domain
sockets, and I'd rather just have it not be available.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5671076

Fixes #2774

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5673076

Also fixes plan9 cross-build.

R=rsc, r
CC=golang-dev
https://golang.org/cl/5675073

Fixes #2844.

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/5675072

R=golang-dev, r, r
CC=golang-dev
https://golang.org/cl/5674067

Sigh.

R=golang-dev, gri, nigeltao
CC=golang-dev
https://golang.org/cl/5675071

This revolutionary transfiguration undergirding the code base
Fixes #2945.

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/5676072

The set of errors forwarded by the os package varied with system and
was therefore non-portable.
Three helpers added for portable error checking: IsExist, IsNotExist, and IsPermission.
One or two more may need to come, but let's keep the set very small to discourage
thinking about errors that way.

R=mikioh.mikioh, gustavo, r, rsc
CC=golang-dev
https://golang.org/cl/5672047

/tmp being itself a symlink causes problems for the test, so use / as the absolute path.

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/5675070

Invalid return statements were accidentally compiling or
triggering internal errors.
Fixes #3044.

R=golang-dev, rsc
CC=golang-dev, remy
https://golang.org/cl/5673074

Complete list of tokens that can start a top-level expression.

R=rsc
CC=golang-dev
https://golang.org/cl/5671074

Fixes #3031.

R=golang-dev, rsc, r, iant
CC=golang-dev
https://golang.org/cl/5676054

Update some other docs too.

Update #2955.

R=rsc
CC=golang-dev
https://golang.org/cl/5676060

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5671072

Fixes #3042.

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/5675067

It was being skipped due to an oversight.
Also adjust naming parameters for map type construction - makes debugging easier.
Prelude to issue 3026.

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/5674071

Fixes #2950.
Fixes #2951.

R=golang-dev, r
CC=golang-dev, remy
https://golang.org/cl/5672044

It depended on the old behavior of functions in structs.

R=golang-dev, rsc
CC=golang-dev, r
https://golang.org/cl/5656076

NewFile take uintptr
make syscall.ProcAttr.Files be []uintptr

R=rsc
CC=golang-dev
https://golang.org/cl/5656073

Clang 3.1 has more warnings enabled by default than GCC.
Combined with -Werror, they cause the build to fail
unnecessarily.  if the name of our compiler ends in "clang",
add the necessary extra -Wno options.  Ideally we would add
these flags unconditionally, as GCC is supposed to ignore
unknown -Wno flags, but apple's llvm-gcc doesn't.

Fixes #2878.

R=rsc, dave
CC=golang-dev
https://golang.org/cl/5673055