[dev.unified] all: merge master (635b124) into dev.unified

Merge List:

+ 2022-06-16 635b124 cmd/go: pass GOEXPERIMENT through to subtests
+ 2022-06-16 ef808ae expvar: don't crash if map value set to nil
+ 2022-06-16 32510ee go/parser: remove unused method checkBinaryExpr
+ 2022-06-16 74f1fa6 cmd/go: parallelize matchPackages work in each module
+ 2022-06-16 1d9d99b cmd/link: consider alignment in carrier symbol size calculation
+ 2022-06-16 bcce8ef spec: adjust incorrect sentence in section on rune literals
+ 2022-06-16 ecc268a test: add test that gofrontend fails
+ 2022-06-15 b6c1606 internal/goarch, internal/goos: update generators for syslist.go
+ 2022-06-15 91baf5c reflect: fix reference comment to runtime/map.go
+ 2022-06-15 0e3d0c9 syscall: clarify Pdeathsig documentation on Linux
+ 2022-06-15 74bf90c go/types, types2: add test case for issue for coverage
+ 2022-06-15 0cd0c12 doc/go1.19: use matching closing tag in unix build constraint heading
+ 2022-06-15 97bfc77 syscall, runtime/internal/syscall: always zero the higher bits of return value on linux/loong64
+ 2022-06-15 937fa50 net/netip: add missing ) in ParsePrefix errors
+ 2022-06-15 c2c76c6 cmd/link: set alignment for carrier symbols
+ 2022-06-15 36147dd cmd/go/internal/modindex: disable indexing for modules outside GOROOT and the module cache
+ 2022-06-15 2a78e8a test: add tests for string/[]byte/[]rune conversions
+ 2022-06-15 f9c0264 net: avoid infinite recursion in Windows Resolver.lookupTXT
+ 2022-06-14 0dffda1 spec: clarify "slice of bytes" and "slice of runes" through examples
+ 2022-06-14 c22a6c3 reflect: when StructOf overflows computing size/offset, panic
+ 2022-06-14 e1e66a0 cmd/compile,runtime,reflect: move embedded bit from offset to name
+ 2022-06-14 cb9bf93 cmd/go: quote package directory when calling glob
+ 2022-06-14 cad477c cpu: fix typos in test case
+ 2022-06-13 c29be2d runtime: add HACKING section on nosplit functions
+ 2022-06-13 c5be77b doc/go1.19: minor edits
+ 2022-06-13 56bc309 sync: improve linearity test robustness
+ 2022-06-13 1fe2810 sync: move lock linearity test and treat it like a performance test
+ 2022-06-13 6130461 internal/testmath: add two-sample Welch's t-test for performance tests
+ 2022-06-13 24b9039 doc/go1.19: prefer relative links to other parts of the Go website
+ 2022-06-13 fbc75df cmd/cgo: remove -fsanitize=hwaddress hardware tags
+ 2022-06-13 5ee939b spec: clarify behavior of map size hint for make built-in
+ 2022-06-13 4703546 spec: add missing optional type arguments after TypeName in syntax
+ 2022-06-13 2c52465 net: avoid darwin_arm64 bug in TestDialParallelSpuriousConnection
+ 2022-06-13 9228d7d doc/go1.19: add a release note for module indexing
+ 2022-06-13 7eeec1f cmd/compile: fix missing dict pass for type assertions
+ 2022-06-13 d27128b doc/go1.19: fix crypto tags
+ 2022-06-10 55590f3 net/http: doc: update RFC reference for appropriate HTTP codes
+ 2022-06-10 ff3db8d doc: fix typos in Go memory model
+ 2022-06-10 fb75c2d cmd/dist, cmd/internal/metadata: don't install metadata binary
+ 2022-06-10 386245b runtime: fix stack split at bad time when fuzzing
+ 2022-06-09 2cfbef4 cmd/cgo: recognize clang 14 DWARF type names
+ 2022-06-09 c7ccabf runtime/cgo: retry _beginthread on EACCES
+ 2022-06-09 91019cc runtime/cgo: merge bodies of cgo_sys_thread_start on windows
+ 2022-06-09 840e99e api: promote next to go1.19
+ 2022-06-09 1a2ca95 go/types, types2: only set instance context if packages match
+ 2022-06-08 b51d44c cmd/go/testdata/script: fix skip on list_replace_absolute_windows
+ 2022-06-08 80f86f7 api/next: minor reformat
+ 2022-06-08 13f6be2 runtime: use pidleget for faketime jump
+ 2022-06-08 1292176 cmd/go: clean paths before using them form index functions
+ 2022-06-08 1858ea5 syscall: remove unused setgroups on linux/loong64
+ 2022-06-08 bdde41e runtime: skip TestGdbBacktrace on gdb bug
+ 2022-06-08 432158b net: fix testHookDialTCP race
+ 2022-06-08 899f0a2 cmd/go: enable module index by default
+ 2022-06-08 f862280 cmd/go: properly call PackageModuleRoot to get modroot for index
+ 2022-06-08 d651660 cmd/go: set Root and target fields for packages in GOPATH
+ 2022-06-08 4afb0b9 doc/go1.19: delete remaining TODOs
+ 2022-06-08 3426b72 runtime: gofmt
+ 2022-06-08 f330a3a doc/go1.19: complete most remaining TODOs
+ 2022-06-08 2882786 runtime: remove unused pipe and setNonblock on linux/loong64
+ 2022-06-08 decdd87 doc/go1.19: mention riscv64 supported regabi
+ 2022-06-07 b72a6a7 os: document that Chdir affects fs.FS returned by DirFS with a relative path
+ 2022-06-07 30b929b syscall: remove unused accept on linux/loong64
+ 2022-06-07 a7551fe net: use synthetic network in TestDialParallel
+ 2022-06-07 19d71ac doc/go1.19: document that the assembler requires -p
+ 2022-06-07 d151134 doc/go1.19: document linker CL that switches DWARF compressed section format
+ 2022-06-07 3507805 go/types, types2: better error message for invalid use of constraint type
+ 2022-06-07 269bf7e go/types, types2: better error message if type is not in type set
+ 2022-06-07 d4fb93b go/types, types2: use | rather than ∪ when printing term lists
+ 2022-06-07 346698e doc/go1.19: add release notes for net/http and net/url
+ 2022-06-07 7a82c68 doc/go1.19: adjust runtime release notes
+ 2022-06-07 f3e051a runtime: document GOMEMLIMIT in environment variables section
+ 2022-06-07 ef2567c doc/go1.19: document loong64 port
+ 2022-06-07 69bb7c6 sync/atomic: clarify that 8-byte alignment of variables is due to escape
+ 2022-06-07 81033fb doc/go1.19: some platforms are still on TSAN v2
+ 2022-06-07 0c3a054 doc/go1.19: compiler section is complete, modulo TODOs
+ 2022-06-07 835a946 doc/go1.19: minor edits
+ 2022-06-07 429a404 doc/go1.19: complete TODOs for go/types
+ 2022-06-07 d2630aa doc/go1.19: add various crypto release notes
+ 2022-06-07 77d9252 runtime: fix inline assembly trampoline for arm64
+ 2022-06-07 38607c5 cmd/link: specify -Wl,-z params as documented
+ 2022-06-07 95b68e1 doc/go1.19: delete boringcrypto TODO
+ 2022-06-07 a79623b doc/go1.19: add more TODOs from updated relnote
+ 2022-06-06 acfff42 doc/go1.19: add release notes for the soft memory limit and idle GC
+ 2022-06-06 a71ca3d runtime, sync, sync/atomic: document happens-before guarantees
+ 2022-06-06 3651a61 go/doc/comment: add heuristics for common badly formatted comments
+ 2022-06-06 4c08260 doc/go_mem: update revision date
+ 2022-06-06 7271a0a doc/go1.19: gc requires -p=importpath
+ 2022-06-06 c1e2ecb doc/go1.19: document Resolver.PreferGo
+ 2022-06-06 11195c6 cmd/go: use index to match packages in dependency modules
+ 2022-06-06 ea5d7cb all: boringcrypto post-merge cleanup
+ 2022-06-06 6c7b223 go/doc/comment: do not turn ``` into “`
+ 2022-06-06 ce757e9 go/doc/comment: add doc comment
+ 2022-06-06 95547ae cmd/compile: cast riscv64 rewrite shifts to unsigned int
+ 2022-06-06 d43ddc1 strconv: fix typo in atof.go
+ 2022-06-06 2fa45a4 cmd/link/internal/loadpe: handle _main reference properly
+ 2022-06-06 fc97075 go/types, types2: simplify implementation of validType (fix TODO)
+ 2022-06-06 07eca49 go/types, types2: use type nest to detect type cycles (fix validType)
+ 2022-06-06 770146d doc/go1.19: add TODOs for changes to go/types
+ 2022-06-06 1b8ca75 runtime: fix breakpoint in ppc64x
+ 2022-06-06 9ce28b5 text/template/parse: fix data race on lexer initialization
+ 2022-06-06 47e34ca go/types, types2: ensure that named types never expand infinitely
+ 2022-06-06 02e69cf go/types, types2: store Named instance information separately
+ 2022-06-06 1323b0e go/types, types2: eliminate methodList in favor of just using Named.mu
+ 2022-06-06 846f971 go/types, types2: remove Named.once in favor of monotonic state
+ 2022-06-06 66cbf67 cmd/buildid: reject rewriting legacy buildids
+ 2022-06-04 47f806c strconv: clarify ParseFloat accepts Go syntax for float literals
+ 2022-06-04 2730c6a runtime: fix typo in libfuzzer_arm64.s
+ 2022-06-04 a32a592 database/sql/driver: fix typo in driver.go
+ 2022-06-04 0293c51 regexp: avoid copying each instruction executed
+ 2022-06-04 8659114 doc: update Go memory model
+ 2022-06-04 fc66cae doc/go1.19: remove TODO about LimitedReader
+ 2022-06-04 f8a53df io: revert: add an Err field to LimitedReader
+ 2022-06-04 21f0528 cmd/go: index standard library packages

Change-Id: Ia7595c77a555fd2a0e7bb3b6b2cfbb745bd4947b