patch 8.2.4464: Dtrace files are recognized as filetype D

Problem:    Dtrace files are recognized as filetype D.
Solution:   Add a pattern for Dtrace files. (Teubel György, closes #9841)
            Add some more testing.
diff --git a/src/version.c b/src/version.c
index 1491e81..69be8cd 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4464,
+/**/
     4463,
 /**/
     4462,