Fix mysql connection string

Signed-off-by: Aurelien Gaston <aurelien.gaston@krondor.fr>

Author: Aurelien Gaston

internal/storage/sql.go

@@ -92,10 +92,11 @@ func pgconn(u *url.URL) string {
 func mysqlconn(u *url.URL) string {
 	password, _ := u.User.Password()
 	return fmt.Sprintf(
-		"%s:%s@%s/%s?%s",
+		"%s:%s@tcp(%s:%s)/%s?%s",
 		u.User.Username(),
 		password,
-		u.Host,
+		u.Hostname(),
+		u.Port(),
 		strings.TrimLeft(u.Path, "/"),
 		u.RawQuery,
 	)