cmd/cli: add WSAEHOSTUNREACH to network error

Windows may raise WSAEHOSTUNREACH instead WSAENETUNREACH in case of
network not available when resuming from sleep or switching network, so
checkUpstream is never kicked in for this type of error.

cmd/cli/prog.go

@@ -525,6 +525,7 @@ var (
 	windowsENETUNREACH  = syscall.Errno(10051)
 	windowsEINVAL       = syscall.Errno(10022)
 	windowsEADDRINUSE   = syscall.Errno(10048)
+	windowsEHOSTUNREACH = syscall.Errno(10065)
 )
 
 func errUrlNetworkError(err error) bool {
@@ -547,7 +548,8 @@ func errNetworkError(err error) bool {
 			errors.Is(opErr.Err, syscall.ENETUNREACH),
 			errors.Is(opErr.Err, windowsENETUNREACH),
 			errors.Is(opErr.Err, windowsEINVAL),
-			errors.Is(opErr.Err, windowsECONNREFUSED):
+			errors.Is(opErr.Err, windowsECONNREFUSED),
+			errors.Is(opErr.Err, windowsEHOSTUNREACH):
 			return true
 		}
 	}