The new type [KeepAliveConfig] permits fine-tuning the keep-alive
options for TCP connections, via a new [TCPConn.SetKeepAliveConfig]

To install:

1) chrome://extensions/
2) click "[+] Developer Mode" in top right
3) "Load unpacked extension..."
4) pick $GOROOT/misc/chrome/gophertool

pkg debug/dwarf, type LineEntry struct, File *LineFile
pkg debug/dwarf, type LineEntry struct, ISA int
pkg debug/dwarf, type LineEntry struct, IsStmt bool
pkg debug/dwarf, type LineEntry struct, Line int
pkg debug/dwarf, type LineEntry struct, OpIndex int
pkg debug/dwarf, type LineEntry struct, PrologueEnd bool
pkg debug/dwarf, type LineFile struct
pkg debug/dwarf, type LineFile struct, Length int

pkg syscall (netbsd-arm64-cgo), const IPPROTO_CARP = 112
pkg syscall (netbsd-arm64-cgo), const IPPROTO_CARP ideal-int
pkg syscall (netbsd-arm64-cgo), const IPPROTO_DONE = 257
pkg syscall (netbsd-arm64-cgo), const IPPROTO_DONE ideal-int
pkg syscall (netbsd-arm64-cgo), const IPPROTO_DSTOPTS = 60
pkg syscall (netbsd-arm64-cgo), const IPPROTO_DSTOPTS ideal-int
pkg syscall (netbsd-arm64-cgo), const IPPROTO_EGP = 8

pkg syscall (darwin-arm64), const IPPROTO_DIVERT = 254
pkg syscall (darwin-arm64), const IPPROTO_DIVERT ideal-int
pkg syscall (darwin-arm64), const IPPROTO_DONE = 257
pkg syscall (darwin-arm64), const IPPROTO_DONE ideal-int
pkg syscall (darwin-arm64), const IPPROTO_DSTOPTS = 60
pkg syscall (darwin-arm64), const IPPROTO_DSTOPTS ideal-int
pkg syscall (darwin-arm64), const IPPROTO_EGP = 8

pkg syscall (freebsd-arm64), const IPPROTO_DIVERT = 258
pkg syscall (freebsd-arm64), const IPPROTO_DIVERT ideal-int
pkg syscall (freebsd-arm64), const IPPROTO_DONE = 257
pkg syscall (freebsd-arm64), const IPPROTO_DONE ideal-int
pkg syscall (freebsd-arm64), const IPPROTO_DSTOPTS = 60
pkg syscall (freebsd-arm64), const IPPROTO_DSTOPTS ideal-int
pkg syscall (freebsd-arm64), const IPPROTO_EGP = 8

pkg debug/gosym, type Func struct, embedded *Sym
pkg debug/gosym, type LineTable struct
pkg debug/gosym, type LineTable struct, Data []uint8
pkg debug/gosym, type LineTable struct, Line int
pkg debug/gosym, type LineTable struct, PC uint64
pkg debug/gosym, type Obj struct
pkg debug/gosym, type Obj struct, Funcs []Func
pkg debug/gosym, type Obj struct, Paths []Sym
pkg debug/gosym, type Sym struct

Each file is a list of API features, one per line.

go1.txt (and similarly named files) are frozen once a version has been
shipped. Each file adds new lines but does not remove any.

except.txt lists features that may disappear without breaking true
compatibility.

Starting with go1.19.txt, each API feature line must end in "#nnnnn"
giving the GitHub issue number of the proposal issue that accepted

poll the length to decide whether a receive on the timer channel
will succeed.
Such code should use a non-blocking receive instead.

These new behaviors are only enabled when the main Go program
is in a module with a `go.mod` `go` line using Go 1.23.0 or later.
When Go 1.23 builds older programs, the old behaviors remain in effect.
The new [GODEBUG setting](/doc/godebug) [`asynctimerchan=1`](/pkg/time/#NewTimer)

The files should be in the subdirectory for the package with the new
API, and should be named after the issue number of the API proposal.
For example, if the directory `6-stdlib/99-minor` is present,
then an `api/next` file with the line

    pkg net/http, function F #12345

should have a corresponding file named `doc/next/6-stdlib/99-minor/net/http/12345.md`.
At a minimum, that file should contain either a full sentence or a TODO,