New listen syntax for broadcast adresses

FossilOrigin-Name: 2515dbebe9c1977701b8cd62ee94323a4e8869f1e1f30aff5dcc2632236ac7f6

src/ac/ac.default.conf

@@ -127,6 +127,15 @@
 # Defalut: 
 # listen =
 
+# broadcast_listen - Broadcast listen address
+# If ommited, the boraadcast listen adresses a determined automatically
+# Otherwise, for address syntax, see listen.
+#
+# Default:
+# broadcast_listen = 
+#
+braodcast_listen = 0.0.0.0:8000/capwap
+
 # use_loopback
 # Include loopback interfaces if listen addresses are auto detected
 #