Bonding dialog

Creates a makeshift interface between epicardium and pycardium to support a bonding dialog.

The dialog displays the confirmation value and shows if the bonding succeeded / failed.

epicardium/modules/config.c

@@ -511,7 +511,7 @@ int epic_config_set_string(const char *key, const char *value_in)
 			slot->value_offset, buf, sizeof(buf)
 		);
 		if (nread == 0) {
-			LOG_DEBUG("card10.cfg", "could not read old value", );
+			LOG_DEBUG("card10.cfg", "could not read old value");
 			goto complex_out;
 		}