Update Feature requests

Feature-requests.md

@@ -20,4 +20,5 @@ big feature that I will do: add satellite setup pop-up window, where uplinik, do
 - version info
 - bands: currently we support GENE, 160....6m but should extend to 4m for some HF rigs 
 - bands: on other rigs we may have VHF/UHF as well -- add 2, 70, 23 depending on model
-- debug flag, maybe with severity (-v vs -vv -vvv etc). suppress debug output w/o flag
+- debug flag, maybe with severity (-v vs -vv -vvv etc). suppress debug output w/o flag
+- key to switch on/off audio