* Added the 'enable-upnp' flag to the list of supported command line arguments.
If the user specifies this feature flag (adds --enable-upnp as an argument) - the Beacon-chain and Validator services, when started, will initialize libp2p with the UPNP options.
* Added the new arg to usage.go due to test failure
* Update shared/p2p/service.go
Changed the logging according to Preston's recommendation.
Co-Authored-By: Preston Van Loon <preston@prysmaticlabs.com>
* Code review changes:
1. File formatting.
2. Command line arg more detailed description.
* checkpoint on super sync with reputation
* ensure handling only expected peers msg
* exclusive of finalized block
* skip block saved already
* clean up struct
* remove 2 more fields
* _
* everything builds, but doesnt test yet
* lint
* fix p2p tests
* space
* space
* space
* fmt
* fmt
* Preliminary support for relay nodes
* lint
* Add comment, remove TODO
* work on relay address factory
* dial relay node, if available
* forgot new files
* fix service registry breakage
* added logging
* Added a peer count with prometheus
* always start mDNS
* fix lint
