for example, if building in src/lib/container,
objects go in obj/container/, so that 6g -Iobj
will find "container/vector".

install packages in hierarchy in $GOROOT.

this change only updates gobuild.
another change will have to update all
the sources to refer to "container/vector" etc
and regenerate all the Makefiles.

there are some pretty lame functions here
(e.g., Mkdir, Remove, the Getenv("PWD"))
but i will implement better ones in another CL.

R=r
DELTA=117  (99 added, 2 deleted, 16 changed)
OCL=27550
CL=27574

R=rsc
DELTA=92  (73 added, 0 deleted, 19 changed)
OCL=27566
CL=27572

fix bug in RPC.go (import "RPC" not "rpc.pb")

R=r
DELTA=483  (261 added, 64 deleted, 158 changed)
OCL=27547
CL=27549

R=r
DELTA=1305  (704 added, 590 deleted, 11 changed)
OCL=27546
CL=27548

R=ken
OCL=27537
CL=27545

as the .6 file is read.   now tests will be run in file order.

R=rsc
DELTA=9  (6 added, 1 deleted, 2 changed)
OCL=27542
CL=27544

R=gri
OCL=27543
CL=27543

R=rsc
DELTA=13  (6 added, 0 deleted, 7 changed)
OCL=27539
CL=27541

R=rsc
DELTA=5  (3 added, 0 deleted, 2 changed)
OCL=27536
CL=27540

R=rsc,iant
DELTA=17  (11 added, 0 deleted, 6 changed)
OCL=27529
CL=27535

as a reminder, the old conversion
was that you could write

	var arr [10]byte;
	var slice []byte;
	slice = arr;

but now you have to write

	slice = &arr;

the change eliminates an implicit &, so that
the only implicit &s left are in the . operator
and in string(arr).

also, removed utf8.EncodeRuneToString
in favor of string(rune).

R=r
DELTA=83  (1 added, 23 deleted, 59 changed)
OCL=27531
CL=27534

R=ken
OCL=27533
CL=27533

R=r
DELTA=24  (21 added, 0 deleted, 3 changed)
OCL=27527
CL=27527

R=gri
DELTA=1341  (668 added, 282 deleted, 391 changed)
OCL=27485
CL=27526

R=r
DELTA=6  (5 added, 1 deleted, 0 changed)
OCL=27500
CL=27525

(HTTP requires absolute in protocol).

add URL tests

R=r
DELTA=243  (242 added, 0 deleted, 1 changed)
OCL=27472
CL=27523

R=r
DELTA=36  (1 added, 0 deleted, 35 changed)
OCL=27484
CL=27522

R=gri
DELTA=252  (240 added, 3 deleted, 9 changed)
OCL=27482
CL=27521

R=r,dnadasi
DELTA=9  (8 added, 0 deleted, 1 changed)
OCL=27473
CL=27486

R=r
DELTA=10  (10 added, 0 deleted, 0 changed)
OCL=27479
CL=27481

turn on error reporting; not enough info otherwise.

R=r
DELTA=49  (43 added, 6 deleted, 0 changed)
OCL=27476
CL=27478

R=rsc
DELTA=139  (90 added, 7 deleted, 42 changed)
OCL=27475
CL=27477

R=r
DELTA=30  (30 added, 0 deleted, 0 changed)
OCL=27470
CL=27474

	file system server
	add NotFound, Redirect functions
	method on a string

R=r
DELTA=212  (199 added, 4 deleted, 9 changed)
OCL=27467
CL=27471

DELTA=32  (29 added, 2 deleted, 1 changed)
OCL=27197
CL=27469

some day i will fix this for real.

R=ken
OCL=27468
CL=27468

R=r
DELTA=16  (14 added, 0 deleted, 2 changed)
OCL=27464
CL=27466

after EOF has been hit, because nbuf is now 0 or -1.

discard old comment.

R=r
DELTA=3  (0 added, 0 deleted, 3 changed)
OCL=27463
CL=27465

6g generates for functions: expect the keyword "func".  The
older reflection syntax, without the "func", is still
recognized for simplicity in parsing interface reflection
strings.

R=r,rsc
DELTA=66  (31 added, 8 deleted, 27 changed)
OCL=27396
CL=27422

delay indirection so that values passed to
formatters preserve pointer-ness.

R=r
OCL=27410
CL=27414

update pretty to use it.
change stdout to stderr in pretty.

R=rsc
DELTA=173  (52 added, 24 deleted, 97 changed)
OCL=27405
CL=27409

R=rsc
DELTA=6  (0 added, 0 deleted, 6 changed)
OCL=27404
CL=27404

--- FAIL: template.TestAll
	for "{.section data}{.end} {header}\n": expected " 77\n" got " {header}\n"

R=r
DELTA=20  (14 added, 0 deleted, 6 changed)
OCL=27395
CL=27402

	func(w io.Write, value interface{}, format string)

R=r
DELTA=16  (3 added, 3 deleted, 10 changed)
OCL=27399
CL=27401

R=rsc
DELTA=2  (0 added, 0 deleted, 2 changed)
OCL=27397
CL=27400

change canexec to canExec.

R=r
DELTA=7  (0 added, 0 deleted, 7 changed)
OCL=27393
CL=27398

	* exec.LookPath
	* flag.Args
	* os.Remove
	* strings.HasPrefix
	* strings.HasSuffix
	* syscall.Rmdir

TBR=r
DELTA=100  (100 added, 0 deleted, 0 changed)
OCL=27373
CL=27392

R=gri
DELTA=272  (38 added, 139 deleted, 95 changed)
OCL=27372
CL=27390

R=r
DELTA=5  (3 added, 0 deleted, 2 changed)
OCL=27371
CL=27389

R=r
DELTA=10  (0 added, 0 deleted, 10 changed)
OCL=27374
CL=27388