all: apply go fix

Updates #cleanup

Signed-off-by: Adriano Sela Aviles <adriano@tailscale.com>

net/dns/resolver/forwarder_test.go

@@ -671,10 +671,7 @@ func makeResponseOfSize(tb testing.TB, domain string, targetSize int, includeOPT
 	if includeOPT {
 		baseSize += 11 // OPT record adds ~11 bytes
 	}
-	estimatedRecords := (targetSize - baseSize) / bytesPerRecord
-	if estimatedRecords < 1 {
-		estimatedRecords = 1
-	}
+	estimatedRecords := max((targetSize-baseSize)/bytesPerRecord, 1)
 
 	// Start with estimated records and adjust
 	txtLen := 200
@@ -741,10 +738,7 @@ func makeResponseOfSize(tb testing.TB, domain string, targetSize int, includeOPT
 			// If we need too many records, increase TXT length instead
 			txtLen = 255         // Max single TXT string length
 			bytesPerRecord = 280 // Adjusted estimate
-			estimatedRecords = (targetSize - baseSize) / bytesPerRecord
-			if estimatedRecords < 1 {
-				estimatedRecords = 1
-			}
+			estimatedRecords = max((targetSize-baseSize)/bytesPerRecord, 1)
 		}
 	}
 

net/dns/utf.go

@@ -28,10 +28,7 @@ func maybeUnUTF16(bs []byte) []byte {
 		// Can't be complete UTF-16.
 		return bs
 	}
-	checkLen := 20
-	if len(bs) < checkLen {
-		checkLen = len(bs)
-	}
+	checkLen := min(len(bs), 20)
 	zeroOff := bytes.IndexByte(bs[:checkLen], 0)
 	if zeroOff == -1 {
 		return bs