Now that we have support for feature gates deprecate the autoDefaultNs
config option of nfd-master and replace it with a new alpha feature gate
DisableAutoPrefix (defaults to false). Using a feature gate to handle
and communicate these kind of changes, where the default behavior is
intended to be changed in a future release, feels much more natural than
using random flags/options.
The combined logic of the feature gate and the config option is a
logical OR over disabling auto-prefixing. That is, auto-prefixing is
disabled if either the feature gate or the config options is used set to
disable it:
| DisableAutoPrefix (feature gate)
| false | true
-------------------- | --------------------------------
autoDefaultNs true | ON | OFF
(config opt) false | OFF | OFF
