[master] a0a3299 VRT book keeping

[Dridi Boukelmoune]

commit a0a3299b2c5fbe4036f1cb657bd01796bd07df04
Author: Dridi Boukelmoune <dridi.boukelmoune at gmail.com>
Date:   Tue Nov 14 10:52:27 2017 +0100

    VRT book keeping
    
    The documentation on directors needs an update too.

diff --git a/include/vrt.h b/include/vrt.h
index 2c661a0..76aae7e 100644
--- a/include/vrt.h
+++ b/include/vrt.h
@@ -56,6 +56,8 @@
  *	VRT_Healthy() added
  *	VRT_VSC_Alloc() added
  *	VRT_VSC_Destroy() added
+ *	struct director.event added
+ *	struct director.destroy added
  * 6.1 (2017-09-15 aka 5.2)
  *	http_CollectHdrSep added
  *	VRT_purge modified (may fail a transaction, signature changed)