new type equality restrictions
	better handling of renamed packages
	"sys" is no longer available to programs

R=ken
OCL=28553
CL=28578

if both types are named, they must be
the same type (arising from the same
declaration).

R=r,gri
DELTA=44  (21 added, 4 deleted, 19 changed)
OCL=28436
CL=28577

R=r
DELTA=1  (0 added, 1 deleted, 0 changed)
OCL=28576
CL=28576

TBR=r
OCL=28575
CL=28575

R=r
OCL=28569
CL=28573

R=rsc
DELTA=19  (4 added, 5 deleted, 10 changed)
OCL=28563
CL=28566

R=ken
OCL=28559
CL=28562

make some error types in a few packages

R=r
DELTA=110  (25 added, 46 deleted, 39 changed)
OCL=28382
CL=28561

R=rsc
DELTA=112  (0 added, 4 deleted, 108 changed)
OCL=28537
CL=28543

	io.Read->io.Reader
	io.Write,Close,etc.->io.Writer,Closer etc.

R=rsc
DELTA=190  (0 added, 0 deleted, 190 changed)
OCL=28525
CL=28535

R=rsc
DELTA=15  (0 added, 5 deleted, 10 changed)
OCL=28526
CL=28532

R=rsc
DELTA=1  (0 added, 0 deleted, 1 changed)
OCL=28528
CL=28531

- cleanup of open issues section

R=r
DELTA=31  (12 added, 9 deleted, 10 changed)
OCL=28450
CL=28513

R=r
DELTA=14  (1 added, 4 deleted, 9 changed)
OCL=28447
CL=28509

R=r
DELTA=24  (24 added, 0 deleted, 0 changed)
OCL=28451
CL=28508

dsymonds confirms that this one works.

R=r
DELTA=50  (23 added, 17 deleted, 10 changed)
OCL=28433
CL=28444

(slipped through the cracks last time)

R=rsc
DELTA=2436  (1337 added, 1090 deleted, 9 changed)
OCL=28427
CL=28443

R=rsc
APPROVED=rsc
DELTA=6  (5 added, 0 deleted, 1 changed)
OCL=28398
CL=28430

also tests method calls on ptr to interface value.

R=r
DELTA=74  (74 added, 0 deleted, 0 changed)
OCL=28419
CL=28424

with method m, s.m() is ok and m now shows up
in s's method set for interface runtime.

see http://cl/28419-p2 for new test interface10.go.

R=ken
OCL=28420
CL=28423

net code on IPv4-only machines.

R=r
DELTA=27  (25 added, 0 deleted, 2 changed)
OCL=28404
CL=28411

part 2; missing files

R=ken
OCL=28408
CL=28410

replace "shape error across CALL" with more information.

x.go:7: not enough arguments to CALL
	a int, b int
	int
x.go:10: assignment count mismatch: 3 = 2
x.go:12: too many arguments to RETURN
	[no arguments expected]
	int, int, int

also leave type alone after conversion failure,
for later errors:

bug049.go:6: cannot convert nil constant to string
bug049.go:6: illegal types for operand: EQ
	string
	nil		# this used to be blank

R=ken
OCL=28405
CL=28407

	TEXT tramp
		MOVQ 8(SP), AX
		ADDQ $40, AX
		MOVQ AX, 8(SP)
		JMP oldfunc

	is now

	TEXT tramp
		ADDQ $40, 8(SP)
		JMP oldfunc

	and if s/40/0/, then it simplifies to

	TEXT tramp
		JMP oldfunc

	(the tramp is still needed to satisfy
	symbol references from other object files)

R=ken
OCL=28377
CL=28381

R=r
DELTA=134  (134 added, 0 deleted, 0 changed)
OCL=28373
CL=28380

will submit with fixed compiler

R=r
DELTA=2  (0 added, 0 deleted, 2 changed)
OCL=28371
CL=28379

R=ken
OCL=28374
CL=28378

- format-driven pretty printing now handles all of Go code
- better error handling

R=r
OCL=28370
CL=28372

R=r
OCL=28369
CL=28369

so that 6l can discard strings used by dead code.
also, for short strings, generate DUPOK global
symbols so that references to, say, "%s: %s" in
multiple files result in only a single symbol.

R=ken
OCL=28361
CL=28361

fix that and clean up state handling a little.

R=rsc
DELTA=44  (18 added, 8 deleted, 18 changed)
OCL=28359
CL=28359

R=r
OCL=28321
CL=28357

TBR=gri
OCL=28320
CL=28320

R=r
OCL=28319
CL=28319

R=r
DELTA=9298  (4760 added, 4536 deleted, 2 changed)
OCL=28317
CL=28317

R=ken
OCL=28314
CL=28314

simplify run.bash now that lib has make test that recurs.

R=rsc
DELTA=1179  (578 added, 596 deleted, 5 changed)
OCL=28313
CL=28313

R=r
DELTA=40  (40 added, 0 deleted, 0 changed)
OCL=28308
CL=28311

no substantive changes except:
	- new Makefiles, all auto-generated
	- go/src/lib/Makefile has been extensively edited

R=rsc
OCL=28310
CL=28310

	* byteastring is no longer used
	* do not generate ODCL, OAS for globals
	  (wasn't generating any code but might
	  save one or two init functions)
	* do not call self from Init function

R=ken
OCL=28309
CL=28309