This CL implements a new godoc feature to save the search
index on disk. Use -write_index to create the search
index file named with -index_files. Use -index_files to
provide a glob pattern specifying index file(s) when
starting godoc; in this case the run-time indexer is not
run.

Known issues:
- saving/restoring full text index is not yet supported
- the list of flags and overall usage logic could use a
  cleanup

R=rsc, dsymonds
CC=golang-dev
https://golang.org/cl/4974045

The result of sort.Search is in the interval [0,n);
specifically, if no entry is found, the result is n
and not -1.

R=dsymonds
CC=golang-dev
https://golang.org/cl/4982041

release.r50 looks for newest tag <= go.r50
weekly.2010-10-10 looks for newest tag <= go.2010-10-10

Implements behavior for hg, git, and bzr.

R=dsymonds, rsc, n13m3y3r
CC=golang-dev
https://golang.org/cl/4873057

Since JavaScript doesn't have [u]int64 types, some JSON APIs
encode such types as strings to avoid losing precision.

This adds a new struct tag option ",string" to cause
fields to be wrapped in JSON strings on encoding
and unwrapped from strings when decoding.

R=rsc, gustavo
CC=golang-dev
https://golang.org/cl/4918051

R=rsc
CC=alex.brainman, golang-dev, vcc.163
https://golang.org/cl/4965050

Fixes #979.

R=rsc, alex.brainman
CC=golang-dev, vcc.163
https://golang.org/cl/4894051

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/4967043

This should allow symlinks in tar files. Where previously
as far as I can see they were skipped completely.

R=golang-dev, dsymonds, rsc, bradfitz, bradfitz
CC=golang-dev, mike.rosset
https://golang.org/cl/4973044

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/4963047

Missed in previous change (4951043).

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/4967044

R=ken2
CC=golang-dev
https://golang.org/cl/4978042

This CL changes the internal form of IPMask for IPv4
from 16-byte to 4-byte, also adds Size method to IPMask
struct and changes output string format of IPMask.String
method.

R=rsc
CC=golang-dev
https://golang.org/cl/4950046

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/4962042

Add openbsd 386 runtime support, partially based on the existing
freebsd 386 runtime.

This requires change 4973043.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/4951043

8l: fix handling CALL $(constant) code generated by 8a.
8a,8l: add indirect call instruction: CALL *data(SB).

R=rsc, iant
CC=golang-dev
https://golang.org/cl/4817054

Add openbsd 386 syscall support, partially based on the existing
freebsd 386 syscall implementation.

FTR zerrors_openbsd_386.go cannot currently be completely built on
openbsd/i386 due to what appears to be a gcc bug. The constants can be
successfully generated with -m32 on openbsd/amd64 and the error
table can then be generated on openbsd/i386.

R=rsc
CC=golang-dev
https://golang.org/cl/4969045

- Rename sys_sched_yield() to osyield() as this is now defined in asm.h.
- Only print kern.rtheads message if rfork_thread() failed with ENOTSUP.
- Remove unused variables.

R=rsc
CC=golang-dev
https://golang.org/cl/4973043

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/4966045

gc/bits.c
. improved format with associated cast;
gc/closure.c
gc/dcl.c
gc/range.c
gc/reflect.c
gc/sinit.c
. dropped unnecessary assignments;
gc/gen.c
. dropped unnecessary assignment;
. added static qualifier to local function definition;
gc/go.h
. added varargck pragmas;
gc/lex.c
. used {} instead of ; in if statement to suppress warning;
. replaced exit(0) with exits(0);
. added compilation conditions for SIGBUS/SIGSEGV;
. dropped unnecessary assignment;
gc/mparith2.c
. dropped four unnecessary assignments/initialisations;
gc/obj.c
. added type cast to local pointer;
gc/pgen.c
. added cast and related print format;
gc/subr.c
. replaced exit(1) with exits("error");
. replaced unlink() with remove();
. renamed local cistrmp() as ucistrmp() to remove conflict with
  Plan 9 function by the same name;
gc/swt.c
. added braces instead of ; as empty statment;
gc/typecheck.c
. added static qualifier to local function definition;
. dropped unnecessary assignments;
gc/walk.c
. dropped unnecessary assignments;
. added static qualifier to local function definitions;

R=rsc
CC=golang-dev
https://golang.org/cl/4964046

src/cmd/6g/cgen.c
src/cmd/6g/gobj.c
src/cmd/6g/reg.c
. dropped unused assignments;
src/cmd/6g/gg.h
. added varargck pragmas;
src/cmd/6g/list.c
. adjusted print format for ulong casts;
src/cmd/6g/peep.c
. dropped redundant increment;

R=golang-dev
CC=golang-dev, rsc
https://golang.org/cl/4953049

5g/cgen.c:
. USED(n4) as it is only mentioned in unreachable code later;
. dropped unused assignments;
. commented out unreachable code;
5g/cgen64.c:
5g/ggen.c:
. dropped unused assignments of function return value;
5g/gg.h:
. added varargck pragmas;
5g/peep.c:
. USED(p1) used only in unreacheable code;
. commented out unreachable code;
5g/reg.c:
. dropped unused assignment;

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/4953048

R=adg
CC=golang-dev
https://golang.org/cl/4971043

In amd64 it is the caller who cleans the stack.

R=alex.brainman, vcc.163, jp
CC=golang-dev
https://golang.org/cl/4966046

R=alex.brainman, golang-dev
CC=golang-dev
https://golang.org/cl/4968048

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/4951046

Escape analysis was incorrectly assuming that
functions without bodies don't leak their
parameters.  This meant that sync/atomic's
TestAddInt64 was allocating x on its stack,
and then x was not properly aligned for use
with the atomic 64-bit instructions.  Obviously
we should figure out the alignment story on 5g
too, but this fix is correct and should restore the
build to 'ok'.

TBR=lvd
CC=golang-dev
https://golang.org/cl/4964047

Also standardize on 'utf8' as encoding name.
Apparently either is acceptable.

The user, because it is a StringProperty,
must be of type unicode in order to handle
Unicode correctly.  It must *not* have type string.

The desc, because it is a BlobProperty, must
be of type string in order to handle Unicode correctly.
It must *not* have type unicode.

Yay encoding type pedantry without static typing.

R=adg, mattn.jp
CC=golang-dev
https://golang.org/cl/4973045

cdecl calbacks have been implemented in C/ASM code, just Go function is missing

R=golang-dev, alex.brainman
CC=golang-dev
https://golang.org/cl/4969047

-s now means *disable* escape analysis.

Fix escape leaks for struct/slice/map literals.
Add ... tracking.
Rewrite new(T) and slice literal into stack allocation when safe.

Add annotations to reflect.
Reflect is too chummy with the compiler,
so changes like these affect it more than they should.

R=lvd, dave, gustavo
CC=golang-dev
https://golang.org/cl/4954043

R=rsc
CC=golang-dev, jp, vcc.163
https://golang.org/cl/4926042

R=golang-dev
CC=golang-dev, rsc
https://golang.org/cl/4950050

8g/cgen.c:
8g/gobj.c
. dropped unnecessary assignments;
8g/gg.h
. added varargckk pragmas;
8g/ggen.c
. dropped duplicate assignment;
8g/gsubr.c
. adjusted format in print statement;
. dropped unnecessary assignment;
. replaced GCC's _builtin_return_address(0) with Plan 9's
  getcallerpc(&n) which is defined as a macro in <u.h>;
8g/list.c
. adjusted format in snprint statement;
8g/opt.h
. added varargck pragma (Adr*) that is specific for the invoking
  modules;
8g/peep.c
. dropped unnecessary incrementation;

R=rsc
CC=golang-dev
https://golang.org/cl/4974044

R=rsc
CC=golang-dev, vcc.163
https://golang.org/cl/4963044

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/4966044

The fix is to add ' ' after ';' so that we match
what we used to generate.
Packages like http look for the string with
the space in it, and I don't see a reason to
be so terse.

Also s/buffer/b/

TBR=bradfitz
CC=golang-dev
https://golang.org/cl/4959044

TeeReader is a Reader that writes what it reads.

R=rsc, bradfitz
CC=golang-dev
https://golang.org/cl/4953041

Enforce + document the UTF-8 default.

R=rsc, bradfitz, adg
CC=golang-dev
https://golang.org/cl/4627049

R=bradfitz, rsc
CC=golang-dev
https://golang.org/cl/4654069

R=rsc
CC=golang-dev
https://golang.org/cl/4826041

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/4972043