Teach rfcomm_sppd(8) to recognize "lan" (for LAN Access Using PPP) service

name in '-c' (RFCOMM channel) option.

MFC after:	3 days

usr.bin/bluetooth/rfcomm_sppd/rfcomm_sppd.1

@@ -86,7 +86,9 @@ Supported service names are:
 .Cm DUN
 (for DialUp Networking service),
 .Cm FAX
-(for Fax service) and
+(for Fax service),
+.Cm LAN
+(for LAN Access Using PPP service) and
 .Cm SP
 (for Serial Port service).
 If channel was not specified then

usr.bin/bluetooth/rfcomm_sppd/rfcomm_sppd.c

@@ -107,6 +107,10 @@ main(int argc, char *argv[])
 					service = SDP_SERVICE_CLASS_FAX;
 					break;
 
+				case 'l': /* LAN */
+					service = SDP_SERVICE_CLASS_LAN_ACCESS_USING_PPP;
+					break;
+
 				case 's': /* Serial Port */
 					service = SDP_SERVICE_CLASS_SERIAL_PORT;
 					break;