jack: don't fill aliases by default

JACK does not automatically generate aliases, so don't do that either.

The problem is that no new ports can be created if one already exists
with the same name or any of the aliases. This causes problems when a
port is renamed and a new port is created with the old name because the
alias might still be the old name and port creation fails.

Add a jack.fill-aliases for this purpose.

Fixes #3154

src/daemon/jack.conf.in

@@ -88,6 +88,7 @@ jack.properties = {
      #jack.fix-midi-events   = true
      #jack.global-buffer-size = false
      #jack.max-client-ports   = 768
+     #jack.fill-aliases       = false
 }
 
 # client specific properties