[Enhancement] Negative logging categories

[garethsb]

We could add support to the default/example logging gateway so that categories that should not be logged can be specified in the config.json, e.g. with a simple prefix like "!access". This would prevent logging of messages with this category even if other categories match positively.

nmos-cpp/Development/nmos/log_gate.h

Line 57 in 14fd314

virtual bool pertinent(const std::list<nmos::category>& categories) const