Store the active flag if there is an initial link.

This ensures that we don't spuriously re-detect a link if we have a
race between starting to watch for link state changes and detecting the
initial link.

src/servers/net/AutoconfigLooper.cpp

@@ -130,6 +130,10 @@ AutoconfigLooper::_ReadyToRun()
 	if (interface.HasLink()) {
 		_ConfigureIPv4();
 		//_ConfigureIPv6();	// TODO: router advertisement and dhcpv6
+
+		// Also make sure we don't spuriously try to configure again from
+		// a link changed notification that might race us.
+		fLastMediaStatus |= IFM_ACTIVE;
 	}
 }