Fixes #567.

R=rsc
CC=golang-dev
https://golang.org/cl/195041

also allow func() func().

R=ken2
CC=golang-dev
https://golang.org/cl/194078

no longer ambiguous at top level, thanks to new semicolon rules.

use gofmt layout for function types.

Fixes #528.

R=gri
CC=golang-dev
https://golang.org/cl/194077

R=r, rsc
CC=golang-dev
https://golang.org/cl/193101

a number of fixes for arm elf generation in 5l. -T now works as
advertised, -D now works properly.

R=rsc
CC=golang-dev
https://golang.org/cl/194076

(eliminate assumption of package global name space,
make code easier to move between packages).

R=r
CC=golang-dev
https://golang.org/cl/194072

R=rsc
CC=golang-dev
https://golang.org/cl/186282

R=r
CC=golang-dev
https://golang.org/cl/194064

R=rsc, rsc1
CC=golang-dev
https://golang.org/cl/194046

R=ken2
CC=golang-dev
https://golang.org/cl/194073

R=ken2
CC=golang-dev
https://golang.org/cl/193081

R=ken2
CC=golang-dev
https://golang.org/cl/194071

bonus: type switch now detects multiple uses of identical interface types.
bonus: interface types are now order-independent, following the spec.

R=ken2
CC=golang-dev
https://golang.org/cl/194053

(package main; others are pulled in automatically)

R=ken2
CC=golang-dev
https://golang.org/cl/194069

minor cleanups (which I did at home before
but missed this morning at work)

R=rsc
CC=golang-dev
https://golang.org/cl/193095

R=rsc
CC=golang-dev
https://golang.org/cl/194066

Previous behaviour only picked the first entry (official hostname) but not the aliases.

R=rsc
CC=golang-dev
https://golang.org/cl/193092

Fixes #530.

R=rsc
CC=golang-dev
https://golang.org/cl/193091

- separate parsing from declaration
- setup of correct scopes

R=rsc
CC=golang-dev
https://golang.org/cl/189098

eliminates spurious multiple initialization errors.

give more information in the multiple init errors that remain.

Fixes #87.

R=r
CC=golang-dev
https://golang.org/cl/194052

R=rsc, dho, r
CC=golang-dev
https://golang.org/cl/194045

detect compilation of special package runtime with
compiler flag instead of package name.

R=ken2
CC=golang-dev
https://golang.org/cl/193080

R=ken2
CC=golang-dev
https://golang.org/cl/194051

R=ken2
CC=golang-dev
https://golang.org/cl/193079

(it is installed by apt-get install gawk, I believe)

Fixes #557.

R=rsc
CC=golang-dev
https://golang.org/cl/194050

R=rsc
CC=golang-dev
https://golang.org/cl/193075

5g/6g/8g: add import statements to export metadata, mapping package path to package name.
	recognize "" as the path of the package in export metadata.
	use "" as the path of the package in object symbol names.

5c/6c/8c, 5a/6a/8a: rewrite leading . to "". so that ·Sin means Sin in this package.

5l/6l/8l: rewrite "" in symbol names as object files are read.

gotest: handle new symbol names.

gopack: handle new import lines in export metadata.

Collectively, these changes eliminate the assumption of a global
name space in the object file formats.  Higher level pieces such as
reflect and the computation of type hashes still depend on the
assumption; we're not done yet.

R=ken2, r, ken3
CC=golang-dev
https://golang.org/cl/186263

R=rsc
CC=golang-dev
https://golang.org/cl/186279

R=r
CC=golang-dev
https://golang.org/cl/186283

R=r
CC=golang-dev
https://golang.org/cl/190104

R=r
CC=golang-dev
https://golang.org/cl/190103

TBR=frm.adiputra
CC=golang-dev
https://golang.org/cl/193055

Other code fixing:
- Fixed bugs in get32.
- Fix code for parsing display string (as a new function).
- Fix code for connecting to X server. The old code only work
  if the server is listening to TCP port, otherwise it doesn't
  work (at least in my PC).

R=nigeltao_golang, rsc, jhh
CC=golang-dev
https://golang.org/cl/183111

R=r
CC=frm, golang-dev
https://golang.org/cl/186276

R=rsc, r, gri
CC=golang-dev
https://golang.org/cl/186255

R=rsc
CC=golang-dev
https://golang.org/cl/190088

Fixes #525.

R=r
CC=golang-dev
https://golang.org/cl/190044

  * switch to real dot (.) instead of center dot (·) everywhere in object files.
    before it was half and half depending on where in the name it appeared.
  * in 6c/6a/etc identifiers, · can still be used but turns into . immediately.
  * in export metadata, replace package identifiers with quoted strings
    (still package names, not paths).

R=ken2, r
CC=golang-dev
https://golang.org/cl/190076

need better management of mach semaphores eventually
but this avoids allocating them for uncontended Locks.

R=r
CC=agl1, golang-dev
https://golang.org/cl/190079

Since gcco runs goroutines in independent threads, it needs
locking for the global variables.  This shows up when I use
ordinary increments rather than locked increments for var++.

R=ken2, ken3
CC=golang-dev
https://golang.org/cl/190074