local.m4: Mention that the IPv6 VPN net is logically `safe'.

diff --git a/local.m4 b/local.m4
index a50afd7..3c4a5f6 100644 (file)
--- a/local.m4
+++ b/local.m4
@@ -90,7 +90,7 @@ m4_divert(-1)
 ## top nibble of the network number classifies the network, as follows.
 ##
 ## 8xxx                Untrusted
-## 6xxx                Virtual
+## 6xxx                Virtual, safe
 ## 4xxx                Safe
 ## 0xxx                Unsafe, trusted
 ##