patch 8.1.0406: several command line arguments are not tested

Problem:    Several command line arguments are not tested.
Solution:   Add tests for -A, -F, -H, -p and -V. (Dominique Pelle,
            closes #3446)
diff --git a/src/version.c b/src/version.c
index bfebd24..d14f0d4 100644
--- a/src/version.c
+++ b/src/version.c
@@ -795,6 +795,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    406,
+/**/
     405,
 /**/
     404,