Previously /etc/hosts would be ignored altogether, this change returns matching results
from that file without talking to a DNS server.

R=rsc
CC=golang-dev
https://golang.org/cl/5061042

R=rsc
CC=golang-dev
https://golang.org/cl/5046041

R=agl
CC=golang-dev
https://golang.org/cl/5030054

A port of Provos and Mazières's adapative hashing algorithm. See http://www.usenix.org/events/usenix99/provos/provos_html/node1.html

R=bradfitz, agl, rsc, dchest
CC=golang-dev
https://golang.org/cl/4964078

Mostly useful for the coming crypto/bcrypt package

R=bradfitz, agl, rsc, agl
CC=golang-dev
https://golang.org/cl/5013043

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/5059046

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/5030045

R=dsymonds
CC=golang-dev
https://golang.org/cl/5045045

This addresses several use cases:

(1) <h{{.HeaderLevel}}> used to build hierarchical documents.
(2) <input on{{.EventType}}=...> used in widgets.
(3) <div {{" dir=ltr"}}> used to embed bidi-hints.

It also makes sure that we treat the two templates below the same:

<img src={{if .Avatar}}"{{.Avatar}}"{{else}}"anonymous.png"{{end}}>
<img src="{{if .Avatar}}{{.Avatar}}{{else}}anonymous.png{{end}}">

This splits up tTag into a number of sub-states and adds testcases.

R=nigeltao
CC=golang-dev
https://golang.org/cl/5043042

The template

  <{{.}}

would violate the structure preservation property if allowed and not
normalized, because when {{.}} emitted "", the "<" would be part of
a text node, but if {{.}} emitted "a", the "<" would not be part of
a text node.

This change rewrites '<' in text nodes and RCDATA text nodes to
'&lt;' allowing template authors to write the common, and arguably more
readable:

    Your price: {{.P1}} < list price {{.P2}}

while preserving the structure preservation property.

It also lays the groundwork for comment elision, rewriting

    Foo <!-- comment with secret project details --> Bar

to

    Foo  Bar

R=nigeltao
CC=golang-dev
https://golang.org/cl/5043043

HTML5 uses "Valid URL potentially surrounded by spaces" for
attrs: http://www.w3.org/TR/html5/index.html#attributes-1

    <a href=" {{.}}">

should be escaped to filter out "javascript:..." as data.

R=nigeltao
CC=golang-dev
https://golang.org/cl/5027045

The typical UNIX method for controlling long running process is to
send the process signals. Since this doesn't get you very far, various
ad-hoc, remote-control protocols have been used over time by programs
like Apache and BIND.

Implementing an SSH server means that Go code will have a standard,
secure way to do this in the future.

R=bradfitz, borman, dave, gustavo, dsymonds, r, adg, rsc, rogpeppe, lvd, kevlar, raul.san
CC=golang-dev
https://golang.org/cl/4962064

Documentation more along the lines of os.FileInfo
Fixes #2180.

R=golang-dev, dsymonds
CC=golang-dev, mike.rosset
https://golang.org/cl/4958055

gotest src/pkg/exp/template/html was crashing because the exception handler overflowed the goroutine stack.

R=alex.brainman, golang-dev
CC=golang-dev
https://golang.org/cl/5031049

R=alex.brainman
CC=golang-dev
https://golang.org/cl/5047045

Credit to jp for proof of concept.

R=alex.brainman, jp, rsc, dvyukov
CC=golang-dev
https://golang.org/cl/4960057

filepath.Glob is documented to return nil if no files match
and an error only if the pattern is invalid.  This change
fixes it to work as documented and adds a regression test.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5040045

R=golang-dev, dsymonds
CC=golang-dev, mshields
https://golang.org/cl/5042045

bug330.go:11:6: error: expected numeric type
bug330.go:12:6: error: expected numeric type

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/5031050

R=r
CC=golang-dev
https://golang.org/cl/5039045

clean up duplicate environment for CGI.
overriding former by latter.
On windows, When there are duplicated environments like following,

SCRIPT_FILENAME=c:/progra~1/php/php-cgi.exe
SCRIPT_FILENAME=/foo.php

CreateProcess use first entry.

If make cgi.Handle like following,

        cgih = cgi.Handler{
                Path: "c:/strawberry/perl/bin/perl.exe",
                Dir:  "c:/path/to/webroot",
                Root: "c:/path/to/webroot",
                Args: []string{"foo.php"},
                Env:  []string{"SCRIPT_FILENAME=foo.php"},
        }

http/cgi should behave "SCRIPT_FILENAME is foo.php".
But currently, http/cgi is set duplicate environment entries.
So, browser show binary dump of "php-cgi.exe" that is specified indented
SCRIPT_FILENAME in first entry.
This change clean up duplicates, and use latters.

R=golang-dev, bradfitz, bradfitz
CC=golang-dev
https://golang.org/cl/5010044

is going to support returning multiple matches for a single repeated group.

R=r, rsc, mpvl
CC=golang-dev
https://golang.org/cl/5014045

Trie now uses sparse block when this makes sense.

R=r, r
CC=golang-dev
https://golang.org/cl/5010043

I found a simple test case that does require doing the fixed point TODO
in computeOutCtx.

I found a way though to do this and simplify away the escapeRange
hackiness that was added in https://golang.org/cl/5012044/

R=nigeltao
CC=golang-dev
https://golang.org/cl/5015052

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/5004052

R=golang-dev, dsymonds, r
CC=golang-dev
https://golang.org/cl/5040042

R=golang-dev, bsiegert, rsc, hectorchu
CC=golang-dev
https://golang.org/cl/5016043

This replaces the errStr & errLine members of context with a single err
*Error, and introduces a number of const error codes, one per
escape-time failure mode, that can be separately documented.

The changes to the error documentation moved from doc.go to error.go
are cosmetic.

R=r, nigeltao
CC=golang-dev
https://golang.org/cl/5026041

On app-engine, we cannot import syscall.
The respective constants are already defined
elsewhere for the same reason.

R=r, dsymonds
CC=golang-dev
https://golang.org/cl/5036042

When saving/restoring the fulltext index, the entire
respective suffixarray is now saved/restored (as opposed
to the indexed data only, and the suffixarray recreated).
This saves significant start-up time for large indexes,
at the cost of significantly larger index files.

R=r
CC=golang-dev
https://golang.org/cl/5037043

R=r
CC=golang-dev
https://golang.org/cl/5040041

Fixes #2218

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5037041

Comments from rsc after 4921049 was submitted.

R=rsc
CC=golang-dev
https://golang.org/cl/5034042

Fixes #2208

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5011051

This makes it possible to use a FlagSet as a
field in a larger struct.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5036041

Fixes #1156.
Fixes #2172.

R=gri
CC=golang-dev
https://golang.org/cl/5015044

The go/build package already recognizes
system-specific file names like

        mycode_darwin.go
        mycode_darwin_386.go
        mycode_386.s

However, it is also common to write files that
apply to multiple architectures, so a recent CL added
to go/build the ability to process comments
listing a set of conditions for building.  For example:

        // +build darwin freebsd openbsd/386

says that this file should be compiled only on
OS X, FreeBSD, or 32-bit x86 OpenBSD systems.

These conventions are not yet documented
(hence this long CL description).

This CL adds build comments to the multi-system
files in the core library, a step toward making it
possible to use go/build to build them.

With this change go/build can handle crypto/rand,
exec, net, path/filepath, os/user, and time.

os and syscall need additional adjustments.

R=golang-dev, r, gri, r, gustavo
CC=golang-dev
https://golang.org/cl/5011046

New rules as discussed on CL 5011046.
Also apply to C and assembly files, not just Go files.

R=r, rogpeppe
CC=golang-dev
https://golang.org/cl/5015051

R=iant, iant
CC=golang-dev
https://golang.org/cl/5016051

Fixes #2258

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5016048