radius: increase the info sent during accounting requests

Based on suggestions by Niels Peen. That adds:
Calling-Station-Id in auth message, and Service-Type,
Framed-Protocol, Framed-IP-Address, Acct-Authentic,
NAS-Port-Type, Acct-Session-Time in acct messages.

src/ipc.proto

@@ -87,6 +87,7 @@ message cli_stats_msg
 	required uint64 bytes_in = 1;
 	required uint64 bytes_out = 2;
 	optional bytes sid = 3; /* only required by sec-mod */
+	required uint32 uptime = 4; /* sec-mod */
 }
 
 /* UDP_FD */
@@ -188,6 +189,7 @@ message cookie
 message sec_auth_session_msg
 {
 	required bytes sid = 1;
+	optional uint32 uptime = 3; /* on close */
 }
 
 message sec_auth_session_reply_msg