func IsChild() bool {
	return os.Getenv(envPreforkChildKey) == envPreforkChildVal
}
IsChild determines if the current process is a child of Prefork
package fiber
import (
	"crypto/tls"
	"fmt"
	"net"
	"os"
	"os/exec"
	"runtime"
	"strconv"
	"strings"
	"time"
	"github.com/valyala/fasthttp/reuseport"
)
const (
	envPreforkChildKey = "FIBER_PREFORK_CHILD"
	envPreforkChildVal = "1"
)
var (
	testPreforkMaster = false
)