when some subfields of authInternalUsers or authHTTPExclude were not
set explicitly in the configuration file, default values were used in
their place. This is caused by a strange behavior of Go
(https://github.com/golang/go/issues/21092)
* Add option for ICE servers to be client only
* add clientOnly to configuration file and API docs
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Co-authored-by: aler9 <46489434+aler9@users.noreply.github.com>