Use readBool func

Introduced a new readBool function to parse string values to bool
values.
The function is more general and makes the behavior consistent.

connection.go

@@ -68,15 +68,11 @@ func (mc *mysqlConn) handleParams() (err error) {
 
 		// time.Time parsing
 		case "parseTime":
-			if val == "true" {
-				mc.parseTime = true
-			}
+			mc.parseTime = readBool(val)
 
 		// Strict mode
 		case "strict":
-			if val == "true" {
-				mc.strict = true
-			}
+			mc.strict = readBool(val)
 
 		// TLS-Encryption
 		case "tls":

driver_test.go

@@ -968,7 +968,7 @@ func TestStmtMultiRows(t *testing.T) {
 }
 
 func TestConcurrent(t *testing.T) {
-	if os.Getenv("MYSQL_TEST_CONCURRENT") != "1" {
+	if readBool(os.Getenv("MYSQL_TEST_CONCURRENT")) != true {
 		t.Log("CONCURRENT env var not set. Skipping TestConcurrent")
 		return
 	}

utils.go

@@ -234,6 +234,16 @@ func formatBinaryDateTime(num uint64, data []byte) (driver.Value, error) {
 	return nil, fmt.Errorf("Invalid DATETIME-packet length %d", num)
 }
 
+func readBool(value string) bool {
+	switch strings.ToLower(value) {
+	case "true":
+		return true
+	case "1":
+		return true
+	}
+	return false
+}
+
 /******************************************************************************
 *                       Convert from and to bytes                             *
 ******************************************************************************/