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)
diff --git a/src/version.c b/src/version.c
index 857d72e..570b7d0 100644
--- a/src/version.c
+++ b/src/version.c
@@ -758,6 +758,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3566,
+/**/
     3565,
 /**/
     3564,