enable vdl2 as a service

owrx/modes.py

@@ -197,6 +197,7 @@ class Modes(object):
             underlying=["empty"],
             bandpass=Bandpass(-12500, 12500),
             requirements=["dumpvdl2"],
+            service=True,
             squelch=False,
         )
     ]

owrx/service/__init__.py

@@ -318,6 +318,9 @@ class ServiceHandler(SdrSourceEventClient):
         elif mod == "hfdl":
             from csdr.chain.dumphfdl import DumpHFDL
             return DumpHFDL()
+        elif mod == "vdl2":
+            from csdr.chain.dumpvdl2 import DumpVDL2
+            return DumpVDL2()
 
         raise ValueError("unsupported service modulation: {}".format(mod))