Libp2p improvements

[kamilsa]

KAGOME team is also maintaining cpp-libp2p library which requires maintenance and improvements:

DOS protection

Not to be susceptible to networking DOS attacks we should limit:

• BufferSize of incoming messages
• Number of opened streams
• Number of opened connections

WebRTC

Substrate PR

QUIC

Substrate PR

Helpful links

Solana quic in C https://twitter.com/jump_firedancer/status/1654124396062158850?t=7esQKKDEEO_TlpZm3NF6ow&s=19

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Tasks List:

• Dos protection for libp2p #1450