Comment 1 for bug 1490937

Upstreamed now, needs these patches:

module-switch-on-port-available: Route to preferred profile
module-switch-on-port-available: Use input and output names
card-restore: Save and restore "preferred profile" of port
card: Update preferred_profile for ports when profile changes
device-port: Add preferred_profile field to pa_device_port
alsa-mixer: Fill in input and output names
card: Add variables for splitting up a profile