add primordial goo tier "hidden mode" (aka toy feature needs more work doesn't do it correctly all the way)

Daemon.cpp

@@ -204,6 +204,12 @@ namespace i2p
           i2p::transport::transports.RestrictRoutes({fam});
         } else
           LogPrint(eLogError, "Daemon: no family specified for restricted routes");
+      }
+      bool hidden; i2p::config::GetOption("trust.hidden", hidden);
+      if (hidden)
+      {
+        LogPrint(eLogInfo, "Daemon: using hidden mode");
+        i2p::data::netdb.SetHidden(true);
       }
 			return true;
 		}