Add pw_conf_section_update_props_rules() that will not only update the
properties of a section but wil also apply rules in section.rules and
match against the context properties.
Use this by default when using pw_context_conf_update_props().
Add a new method to get a string name of the VM type. Place the
cpu.vm.name in the context properties.
This makes it possible to deprecate the vm.overrides with something more
flexible based on rules. Update the conf files and docs to refect this.
Document the pulse.fix properties.
Add an option to disable handling of the FIX flags when the pulse.fix.
property is set to an invalid value/0.
See #3317
Previously, when `pw_protocol_pulse_new()` returned NULL,
the code would jump to the `error` label, which would
call `impl_free()`. At this point, however, `impl->module_listener`
is not initialized, which would lead to a SIGSEGV when
`spa_hook_remove()` is called from `impl_free()`.
There is no need to copy the properties, just pass ownership.
Make sure to always have properties for the server. Ensure we
clean up properties on error.
