conf: more work on config changes
Add -c option to pipewire to select config file. Use this to select the uninstalled conf file. Rename conf properties, prefix with context. Simplify the main daemon now that everything can go in config. Simplify pipewire-pulse now that we can put everything in config, it's now virtually the same as pipewire but with a differenct config file. Parse server addresses as array of strings.