Issue 2856 asks for a rename of a few methods to a
more idiomatic Go style. This is a very early API
that evolved organically throughout the years.
Together with the fact that ErrorVectors were embedded
in other data structures (e.g. Parser), just renaming
methods (e.g. GetError -> Error) would lead to undesired
behavior (e.g., Parser would act like an Error). Instead,
cleaned up API a bit more:

- removed ErrorVector in favor of ErrorList (already
present)
- simplified Scanner.Init by making the error handler a
function instead of requiring an ErrorHandler implementation
- adjusted helper functions accordingly
- updated Go 1 doc

Fixes #2856.

R=rsc
CC=golang-dev
https://golang.org/cl/5624047

On 64 bit UML it is not possible to reserve memory at 0xF8<<32.
Detect when linux cannot use these high virtual memory addresses
and drop back to the 32 bit memory allocator.

R=rsc, cw
CC=golang-dev
https://golang.org/cl/5634050

R=rsc
CC=golang-dev
https://golang.org/cl/5643061

Fixes #1814.

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/5647054

Fixes #1797.

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/5645058

Otherwise, the registration semantics are
init-order-dependent, which I was trying very hard
to avoid in the API.  This may break broken programs.

Fixes #2900.

R=golang-dev, r, bradfitz, dsymonds, balasanjay, kevlar
CC=golang-dev
https://golang.org/cl/5644051

Fixes #1955.

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/5643058

R=r, rsc
CC=golang-dev
https://golang.org/cl/5639053

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5642059

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/5646053

Same idea as heap profile: how did each thread get created?
Low memory (256 bytes per OS thread), high reward for
programs that suddenly have many threads running.

Fixes #1477.

R=golang-dev, r, dvyukov
CC=golang-dev
https://golang.org/cl/5639059

This changes makes constant propagation compare 'from' values using node
pointers rather than symbol names when checking to see whether a set
operation is redundant. When a function is inlined multiple times in a
calling function its arguments will share symbol names even though the values
are different. Prior to this fix the bug409 test would hit a case with 6g
where an LEAQ instruction was incorrectly eliminated from the second inlined
function call. 8g appears to have had the same bug, but the test did not fail
there.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5646044

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/5646051

Fixes #2918.

TBR=golang-dev
CC=golang-dev
https://golang.org/cl/5639062

- convert from nil pointers to the nil interface{}
- dereference non-nil pointers
- convert from nil interface{}s to nil pointers
- allocate pointers for non-nil interface{}s
- tests for all of the above

R=golang-dev, bradfitz, rsc, rogpeppe
CC=golang-dev
https://golang.org/cl/5630052

Fixes #2875

R=golang-dev, r, rsc
CC=golang-dev
https://golang.org/cl/5641052

R=golang-dev, r, iant
CC=golang-dev
https://golang.org/cl/5641051

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/5646049

Add Expand, ExpandString for access to the substitution functionality.

Fixes #2736.

R=r, bradfitz, r, rogpeppe, n13m3y3r
CC=golang-dev
https://golang.org/cl/5638046

encoding/xml: handle time.Time as recognized type

The long term plan is to define an interface that time.Time
can implement and that encoding/xml can call, but we are
not going to try to define that interface before Go 1.
Instead, special-case time.Time in package xml, because
it is such a fundamental type, as a stop-gap.
The eventual methods will behave this way.

Fixes #2793.

R=golang-dev, r, r, n13m3y3r
CC=golang-dev
https://golang.org/cl/5634051

Fixes #2642.

R=remyoudompheng, r, r
CC=golang-dev
https://golang.org/cl/5639052

Fixes #2851.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5644048

It appears to want a * on an indirect function call (assembly language)

TBR=rsc

R=golang-dev
CC=golang-dev
https://golang.org/cl/5643054

TBR=rsc

R=golang-dev
CC=golang-dev
https://golang.org/cl/5647049

This also changes the behavior of attribute marshalling so
that strings and byte slices are marshalled even if empty.
The omitempty flag may be used to obtain the previous behavior.

Fixes #2899.

R=rsc
CC=golang-dev
https://golang.org/cl/5645050

R=golang-dev, nigeltao
CC=golang-dev
https://golang.org/cl/5645052

R=golang-dev, dsymonds, r
CC=golang-dev
https://golang.org/cl/5615056

Fixes #2835.

R=golang-dev, n13m3y3r, r, bradfitz
CC=golang-dev
https://golang.org/cl/5645051

Fixes #2847.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5641050

to help debug Issue 2651

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/5644049

The function has a bizarre signature: it was the only public function there
that exposed the reflect package. Also, its definition is peculiar and hard to
explain. It doesn't merit being exported.

This is an API change but really, it should never have been exported and
it's certain very few programs will depend on it: it's too weird.

Fixes #2846.

R=golang-dev, gri, bradfitz
CC=golang-dev
https://golang.org/cl/5639054

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5626045

It complicates the interface unnecessarily.
Document this in go1.html.
Also update the go/doc Makefile.

Fixes #2836.

R=golang-dev, gri, bradfitz
CC=golang-dev
https://golang.org/cl/5642054

Fixes #2853

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5642056

Also simplify the tests.

Fixes #2849.

R=golang-dev, bradfitz, r
CC=golang-dev
https://golang.org/cl/5643045

R=r
CC=golang-dev
https://golang.org/cl/5636045

Fixes #2862.

R=golang-dev, n13m3y3r, iant
CC=golang-dev
https://golang.org/cl/5646048

It's disabled and unreproducible.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5642053

Be careful when printing line comments with incorrect
position information. Maintain additional state
impliedSemi: when set, a comment containing a newline
would imply a semicolon and thus placement must be
delayed.

Precompute state information pertaining to the next
comment for faster checks (the printer is marginally
faster now despite additional checks for each comment).

No effect on existing src, misc sources.

Fixes #1505.

R=rsc
CC=golang-dev
https://golang.org/cl/5598054

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/5643050