[time.Timer] and [time.Ticker].

First, `Timer`s and `Ticker`s that are no longer referred to by the program
become eligible for garbage collection immediately, even if their
`Stop` methods have not been called.
Earlier versions of Go did not collect unstopped `Timer`s until after
they had fired and never collected unstopped `Ticker`s.

Second, the timer channel associated with a `Timer` or `Ticker` is

connecting to servers with buggy HTTP/2 implementations.
These kinds of changes are unavoidable and
[permitted by the Go 1 compatibility rules](/doc/go1compat).
Even so, Go provides a mechanism called GODEBUG to
reduce the impact such changes have on Go developers
using newer toolchains to compile old code.

A GODEBUG setting is a `key=value` pair
that controls the execution of certain parts of a Go program.

pkg testing, method (*F) Error(...interface{})
pkg testing, method (*F) Errorf(string, ...interface{})
pkg testing, method (*F) Fail()
pkg testing, method (*F) FailNow()
pkg testing, method (*F) Failed() bool
pkg testing, method (*F) Fatal(...interface{})
pkg testing, method (*F) Fatalf(string, ...interface{})
pkg testing, method (*F) Fuzz(interface{})
pkg testing, method (*F) Helper()

pkg runtime, const Compiler ideal-string
pkg runtime, const GOARCH string
pkg runtime, const GOOS string
pkg runtime, func Breakpoint()
pkg runtime, func CPUProfile() []uint8
pkg runtime, func Caller(int) (uintptr, string, int, bool)
pkg runtime, func Callers(int, []uintptr) int
pkg runtime, func FuncForPC(uintptr) *Func
pkg runtime, func GC()
pkg runtime, func GOMAXPROCS(int) int

pkg syscall (windows-386), const USAGE_MATCH_TYPE_AND = 0
pkg syscall (windows-386), const USAGE_MATCH_TYPE_OR = 1
pkg syscall (windows-386), const WAIT_ABANDONED = 128
pkg syscall (windows-386), const WAIT_FAILED = 4294967295
pkg syscall (windows-386), const WAIT_OBJECT_0 = 0
pkg syscall (windows-386), const WAIT_TIMEOUT = 258
pkg syscall (windows-386), const WSADESCRIPTION_LEN = 256

pkg testing, type TB interface, Errorf(string, ...interface{})
pkg testing, type TB interface, Fail()
pkg testing, type TB interface, FailNow()
pkg testing, type TB interface, Failed() bool
pkg testing, type TB interface, Fatal(...interface{})
pkg testing, type TB interface, Fatalf(string, ...interface{})
pkg testing, type TB interface, Log(...interface{})