Handle CORS requests (#6289)

vendor/golang.org/x/sys/unix/syscall_openbsd.go

@@ -43,6 +43,23 @@ func nametomib(name string) (mib []_C_int, err error) {
 	return nil, EINVAL
 }
 
+func SysctlClockinfo(name string) (*Clockinfo, error) {
+	mib, err := sysctlmib(name)
+	if err != nil {
+		return nil, err
+	}
+
+	n := uintptr(SizeofClockinfo)
+	var ci Clockinfo
+	if err := sysctl(mib, (*byte)(unsafe.Pointer(&ci)), &n, nil, 0); err != nil {
+		return nil, err
+	}
+	if n != SizeofClockinfo {
+		return nil, EIO
+	}
+	return &ci, nil
+}
+
 func SysctlUvmexp(name string) (*Uvmexp, error) {
 	mib, err := sysctlmib(name)
 	if err != nil {