minissdpd/README: update README

minissdpd/README

@@ -1,12 +1,30 @@
-protocol :
+ * MiniSSDPd - SSDP daemon
+
+(c) Thomas Bernard
+http://miniupnp.free.fr/ or http://miniupnp.tuxfamily.org/
+https://github.com/miniupnp/miniupnp/
+
+MiniSSDPd is a daemon that :
+1 - keeps track of all UPnP devices announcing themselves on the network.
+its database can be queried by local processes using a protocol based on
+a unix socket. That enables local processes to quickly discover UPnP devices
+without broadcasting SSDP message and waiting several seconds for a response.
+2 - keeps a database of local UPnP devices hosted on the machine and
+answering SSDP searchs on their behalf. It enables to run several UPnP devices,
+like an IGD and a MediaServer, on the same machine.
+
+to build, use GNU Make.
+
+
+* protocol :
 
 Connect to the unix socket.
-Sent request, answer response.
+Sent request, get response.
 close unix socket connection.
 
-Request format :
+* Request format :
 1st byte : request type
-          1 - type
+		  1 - type
 		  2 - USN (unique id)
 		  3 - everything
 		  4 - submit service (see below)