state in the FD.

This is Darwin only.  Next CL will make Readdir use Readdirnames to generate its files
and move Readdir into portable code, as well as fix Readdirnames for Linux.

R=rsc
DELTA=116  (79 added, 12 deleted, 25 changed)
OCL=24756
CL=24768

R=r
DELTA=2  (0 added, 1 deleted, 1 changed)
OCL=24755
CL=24760

- directory listings w/ working links
- some links working in source code (most don't do the right thing yet)
- use of logging

R=r
OCL=24728
CL=24728

R=rsc
DELTA=3  (3 added, 0 deleted, 0 changed)
OCL=24727
CL=24727

R=rsc
DELTA=71  (71 added, 0 deleted, 0 changed)
OCL=24687
CL=24694

R=rsc
OCL=24681
CL=24681

R=rsc
DELTA=200  (176 added, 12 deleted, 12 changed)
OCL=24680
CL=24680

R=gri
OCL=24678
CL=24678

the fix appears to be to align the
out struct on an 8 boundary, but that
is a bit involved.

R=ken
OCL=24657
CL=24657

change type (to satisfy OAS) after nodarg:
nodarg uses offset from type too,
and must use correct offset.

R=ken
OCL=24656
CL=24656

Syscall support.
Readdirnames returns array of strings of contents of directory.

R=rsc
DELTA=216  (201 added, 0 deleted, 15 changed)
OCL=24642
CL=24655

R=rsc
DELTA=21  (2 added, 2 deleted, 17 changed)
OCL=24638
CL=24654

R=rsc
DELTA=9  (3 added, 3 deleted, 3 changed)
OCL=24640
CL=24653

R=ken
DELTA=2  (2 added, 0 deleted, 0 changed)
OCL=24643
CL=24643

to pad to size of element rather
than size of array.

R=r
OCL=24641
CL=24641

R=r
OCL=24639
CL=24639

R=rsc
DELTA=30  (0 added, 18 deleted, 12 changed)
OCL=24628
CL=24628

add name to os.FD
clean up some interfaces

R=rsc
DELTA=318  (231 added, 44 deleted, 43 changed)
OCL=24624
CL=24627

R=rsc
DELTA=7  (4 added, 0 deleted, 3 changed)
OCL=24617
CL=24617

- fixed typos, added a reminder for a todo

R=r
DELTA=23  (6 added, 4 deleted, 13 changed)
OCL=24611
CL=24615

R=r
DELTA=14  (14 added, 0 deleted, 0 changed)
OCL=24610
CL=24610

func4.go:8:11: error: invalid operand for unary '&'
func4.go:9:8: error: invalid left hand side of assignment

R=rsc
DELTA=2  (0 added, 0 deleted, 2 changed)
OCL=24294
CL=24603

- first stab at a Go Documentation Server (gds)
- various fixes to make initial version of gds work

R=r
OCL=24588
CL=24588

- don't need *struct
- don't need item/rat both
- closures make the inner slaves easier
- delete some old BUG comments

powser2 is left mostly alone, for variety.

R=rsc
DELTA=134  (2 added, 20 deleted, 112 changed)
OCL=24579
CL=24581

R=r
DELTA=10  (7 added, 0 deleted, 3 changed)
OCL=24577
CL=24577

R=gri
DELTA=31  (30 added, 1 deleted, 0 changed)
OCL=24568
CL=24575

R=ken
OCL=24501
CL=24566

R=r
DELTA=257  (250 added, 1 deleted, 6 changed)
OCL=24509
CL=24565

  - moved Object, Type, Scope  out of AST into symboltable
  - moved universe into symboltable
  - removed dead code
- fixed dependency computation (pretty -d filename.go)
- lots of cleanups
- removed tocken channel connection between parser and scanner
  (was cute, but not really needed)

R=r
OCL=24545
CL=24545

R=ken
OCL=24507
CL=24507

- equality of struct types requires equality of field names

DELTA=4  (0 added, 1 deleted, 3 changed)
OCL=24478
CL=24487

R=rsc
DELTA=18  (18 added, 0 deleted, 0 changed)
OCL=24482
CL=24484

make f(g()) work when g returns multiple
args with names different than f expects.

func swap(a, b int) (c, d int) {
	return b, a
}

swap(swap(1,2))

R=ken
OCL=24474
CL=24476

R=r
DELTA=14  (0 added, 13 deleted, 1 changed)
OCL=24458
CL=24470

R=ken
OCL=24455
CL=24455

- more elegant tracing code
- removed some dead code, cleanups

R=r
OCL=24452
CL=24452

is not right if the .6 is only for data and
the init function.

instead of that, pick up everything and
let the dead code/data eliminator throw
away the parts that weren't useful.

R=r
DELTA=25  (0 added, 22 deleted, 3 changed)
OCL=24446
CL=24446

R=ken
OCL=24442
CL=24442

TBR=r
OCL=24439
CL=24439

.* from regexp since it confuses DejaGNU which runs gcc's
testsuite.

R=rsc
DELTA=3  (0 added, 0 deleted, 3 changed)
OCL=24435
CL=24438