patch 9.0.0583: only recognizing .m3u8 files is inconsistent

Problem:    Only recognizing .m3u8 files is inconsistent.
Solution:   Also matc .m3u files. (issue #11204)
diff --git a/src/version.c b/src/version.c
index 79dda65..fdd6a23 100644
--- a/src/version.c
+++ b/src/version.c
@@ -700,6 +700,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    583,
+/**/
     582,
 /**/
     581,