Implement filter for logger tool

[0xB10C]

The logger tool is quite spammy currently as it prints all events (p2p message, connections, addrman (if enabled), validation, and mempool). It would be good to have a feature where we can pass a command line argument to enable only the desired event types. E.g. passing --log-p2pmsgs would only log p2p messages. Passing --log-p2pmsgs --log-connections would log p2p messages and p2p connections.

[i-am-yuvi]

Indeed that would be interesting!!
using match statement before printing might work for this!!