patch 8.2.3566: build failure on old systems when using nano timestamp

Problem:    Build failure on old systems when using nano timestamp.
Solution:   Define _BSD_SOURCE, _SVID_SOURCE and _DEFAULT_SOURCE. (Gary
            Johnson, closes #9054)

src/version.c

@@ -757,6 +757,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3566,
 /**/
     3565,
 /**/