[release-branch.go1.16] all: merge master into release-branch.go1.16

1004a7c runtime/metrics: update documentation to current interface
6530f26 doc/go1.16: remove draft notice
353e111 doc/go1.16: fix mismatched id attribute
f0d23c9 internal/poll: netpollcheckerr before sendfile
0cb3415 doc: remove all docs not tied to distribution
626ef08 doc: remove install.html and install-source.html
30641e3 internal/poll: if copy_file_range returns 0, assume it failed
33d72fd doc/faq: update generics entry to reflect accepted proposal
852ce7c cmd/go: provide a more helpful suggestion for "go vet -?"
66c2709 cmd/link: fix typo in link_test.go
ff0e93e doc/go1.16: note that package path elements beginning with '.' are disallowed
249da7e CONTRIBUTORS: update for the Go 1.16 release
864d4f1 cmd/go: multiple small 'go help' fixes
26ceae8 spec: More precise wording in section on function calls.
930c2c9 cmd/go: reject embedded files that can't be packed into modules
e5b08e6 io/fs: allow backslash in ValidPath, reject in os.DirFS.Open
ed80790 cmd/compile: mark concrete call of reflect.(*rtype).Method as REFLECTMETHOD
e9c9683 cmd/go: suppress errors from 'go get -d' for packages that only conditionally exist
e0ac989 archive/tar: detect out of bounds accesses in PAX records resulting from padded lengths
c9d6f45 runtime/metrics: fix a couple of documentation typpos
cea4e21 io/fs: backslash is always a glob meta character
dc725bf doc/go1.16: mention new vet check for asn1.Unmarshal
1901853 runtime/metrics: fix panic in readingAllMetric example
ed3e4af syscall/plan9: remove spooky fd action at a distance
724d072 doc/go1.16: add missed heading tag in vet section
b54cd94 embed, io/fs: clarify that leading and trailing slashes are disallowed
4516afe testing/fstest: avoid symlink-induced failures in tester
8869086 runtime: fix typo in histogram.go
e491c6e math/big: fix comment in divRecursiveStep
fca94ab spec: improve the example in Type assertions section
98f8454 cmd/link: don't decode type symbol in shared library in deadcode
1426a57 cmd/link: fix off-by-1 error in findShlibSection
32e789f test: fix incorrectly laid out instructions in issue11656.go
0b6cfea doc/go1.16: document that on OpenBSD syscalls are now made through libc
26e29aa cmd/link: disable TestPIESize if CGO isn't enabled
6ac91e4 doc/go1.16: minor markup fixes
4436114 embed: update docs for proposal tweaks
68058ed runtime: document pointer write atomicity for memclrNoHeapPointers
c8bd801 syscall: generate readlen/writelen for openbsd libc
41bb49b cmd/go: revert TestScript/build_trimpath to use ioutil.ReadFile
725a642 runtime: correct syscall10/syscall10X on openbsd/amd64
4b068ca doc/go1.16: document go/build/constraint package
376518d runtime,syscall: convert syscall on openbsd/arm64 to libc

Change-Id: Icfe3d849f459eda48d7d786d0cd7b082c9c2c325

Author: toothrot

CONTRIBUTORS

@@ -19,22 +19,20 @@ BSD-style license found in the LICENSE file.
 Official binary distributions are available at https://golang.org/dl/.
 
 After downloading a binary release, visit https://golang.org/doc/install
-or load [doc/install.html](./doc/install.html) in your web browser for installation
-instructions.
+for installation instructions.
 
 #### Install From Source
 
 If a binary distribution is not available for your combination of
 operating system and architecture, visit
-https://golang.org/doc/install/source or load [doc/install-source.html](./doc/install-source.html)
-in your web browser for source installation instructions.
+https://golang.org/doc/install/source
+for source installation instructions.
 
 ### Contributing
 
 Go is the work of thousands of contributors. We appreciate your help!
 
-To contribute, please read the contribution guidelines:
-	https://golang.org/doc/contribute.html
+To contribute, please read the contribution guidelines at https://golang.org/doc/contribute.html.
 
 Note that the Go project uses the issue tracker for bug reports and
 proposals only. See https://golang.org/wiki/Questions for a list of