Detected by GCC static analysis.

Fixes #5117.

R=golang-dev, ality, minux.ma
CC=golang-dev
https://golang.org/cl/7665047

in an effort to make builder freebsd-arm-pi and netbsd-arm-qemu pass again.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7621050

R=golang-dev, minux.ma
CC=golang-dev
https://golang.org/cl/7985043

From VisualFC.
Fixes #4862.

R=golang-dev, minux.ma, r
CC=golang-dev
https://golang.org/cl/7568043

An overview is all that's required.

R=golang-dev, remyoudompheng, bradfitz, adg
CC=golang-dev
https://golang.org/cl/7577050

This CL updates CL 7511043;
- adds new test cases for both UDPConn and UnixConn,
- makes sure unnamed UnixAddr handling,
- replaces t.Errorf with t.Fatalf in sockname related test cases.

Fixes #3721 (again).
Fixes #3838 (again).

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/7627048

This CL provides IPv6 scoped addressing zone support as defined
in RFC 4007 for internet protocol family connection setups.

Follwoing types and functions allow a literal IPv6 address with
zone identifer as theirs parameter.

pkg net, func Dial(string, string) (Conn, error)
pkg net, func DialOpt(string, ...DialOption) (Conn, error)
pkg net, func DialTimeout(string, string, time.Duration) (Conn, error)
pkg net, func Listen(string, string) (Listener, error)
pkg net, func ListenPacket(string, string) (PacketConn, error)
pkg net, func ResolveIPAddr(string, string) (*IPAddr, error)
pkg net, func ResolveTCPAddr(string, string) (*TCPAddr, error)
pkg net, func ResolveUDPAddr(string, string) (*UDPAddr, error)
pkg net, type IPAddr struct, Zone string
pkg net, type TCPAddr struct, Zone string
pkg net, type UDPAddr struct, Zone string

Also follwoing methods return a literal IPv6 address with zone
identifier string if possible.

pkg net, method (*IPAddr) String() string
pkg net, method (*TCPAddr) String() string
pkg net, method (*UDPAddr) String() string

Fixes #4234.
Fixes #4501.
Update #5081.

R=rsc, iant
CC=golang-dev
https://golang.org/cl/6816116

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/7577049

I'm not sure how to write a test for this.  The change in
behaviour is that if you somehow get a SIGBUS signal for an
address >= 0x1000, the program will now crash rather than
calling panic.  As far as I know, on x86 GNU/Linux, the only
way to get a SIGBUS (rather than a SIGSEGV) is to set the
stack pointer to an invalid value.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7906045

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7834049

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/7496051

Also simplifies ResolveUnixAddr.

R=golang-dev, dave, rsc, bradfitz
CC=golang-dev
https://golang.org/cl/7510047

Also:
- more consistenly use "xxx" statement rather than <code>xxx</code> statement
- fix/remove unnecessary links

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7821050

R=golang-dev, rsc, jeremyjackins, gri
CC=golang-dev
https://golang.org/cl/7838045

R=ken2
CC=golang-dev
https://golang.org/cl/7838048

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7493048

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7877045

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/7834047

R=dave, rsc
CC=golang-dev
https://golang.org/cl/7970043

E.g conversions from numeric types to RawBytes are missing, what makes RawBytes unusable in some cases.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/7783046

Fixes #5036.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7531045

Will help people find the rules by searching the spec by
having a comment saying "missing return";
"terminating statement" does not evoke the rule to the
uninitiated.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/7838044

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7834046

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7973043

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/7879044

The GIF89a spec says: "Each image must fit within the
boundaries of the Logical Screen, as defined in the
Logical Screen Descriptor." Also, do not accept
GIFs which have too much data for the image size.

R=nigeltao, jra, r
CC=bradfitz, golang-dev
https://golang.org/cl/7602045

On Darwin and FreeBSD, the mmap syscall return value is returned
unmodified. This means that the return value will either be a
valid address or a positive error number.

Also check return value from mmap in SysReserve - the callers of
SysReserve expect nil to be returned if the allocation failed.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/7871043

Rather than just checking for ENOMEM, check for a return value of less
than 4096, so that we catch other errors such as EACCES and EINVAL.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/7942043

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/7958043

R=golang-dev, nigeltao
CC=golang-dev
https://golang.org/cl/7835046

data does not agree with its bounds.

R=r, jeff.allen
CC=golang-dev
https://golang.org/cl/7938043

Change from atoi to strtol since atoi does not set errno.

R=golang-dev, minux.ma, rsc, bradfitz
CC=golang-dev
https://golang.org/cl/7888047

R=adonovan, cw, patrick.allen.higgins, bradfitz
CC=golang-dev
https://golang.org/cl/7844045

Saves over 8KB of allocations per new connection.

benchmark                             old ns/op    new ns/op    delta
BenchmarkServerFakeConnNoKeepAlive        28777        24927  -13.38%

benchmark                            old allocs   new allocs    delta
BenchmarkServerFakeConnNoKeepAlive           52           46  -11.54%

benchmark                             old bytes    new bytes    delta
BenchmarkServerFakeConnNoKeepAlive        13716         5286  -61.46%

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/7799047

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/7927044

After the revert of revision 9ea9e7e6e0c8
the related revision 76ff7da868c6 must be reverted too.

Fixes #5102.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7961044

To be submitted once gc agrees.

R=rsc, iant, remyoudompheng
CC=golang-dev
https://golang.org/cl/7861045

Fixes #4813.

R=golang-dev, daniel.morsing, rsc
CC=golang-dev
https://golang.org/cl/7625050

-notes="BUG|TODO" instead of -notes="BUG,TODO".
Permits -notes=".*" to see all notes.

R=cnicolaou
CC=golang-dev
https://golang.org/cl/7951043

Also fix the examples to use stderr for errors.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/7716052