For deeply encapsulated connections (think AWS traffic mirroring format
like IP,UDP,GENEVE,IP,UDP,VXLAN,ETH,IP,TCP), the Dispatcher::Lookup()
method is fairly visible in profiles when running in bare mode.
This changes the Analyzer::Lookup() and Dispatcher::Lookup() return value
breaking the API in favor of the performance improvement.
Relates to zeek/zeek#3379.
This largely copies over Spicy's `.clang-format` configuration file. The
one place where we deviate is header include order since Zeek depends on
headers being included in a certain order.
This is still WIP and includes the following changes:
* Dispatchers are now part of analyzers (moving dispatching logic from
the manager to the analyzers)
* All available analyzers are instantiated on start up
* Removal of configuration class
