doc: Update connman-api with dual stack contexts

diff --git a/doc/connman-api.txt b/doc/connman-api.txt
index ece5bd3..32ffeba 100644 (file)
--- a/doc/connman-api.txt
+++ b/doc/connman-api.txt
@@ -195,7 +195,7 @@ Properties  boolean Active [readwrite]
                string Protocol [readwrite]
 
                        Holds the protocol for this context.  Valid values
-                       are: "ip" and "ipv6".
+                       are: "ip", "ipv6" and "dual".
 
                string Name [readwrite]