Constant zebra_network::protocol::external::inv::MAX_INV_IN_RECEIVED_MESSAGE

pub const MAX_INV_IN_RECEIVED_MESSAGE: u64 = 50_000;

The maximum number of inventory items in a network message received from a peer.

After ZIP-239, this would allow a message filled with MSG_WTX entries to be around 3.4 MB, so we also need a separate constant to limit the number of inv entries that we send.

Same as MAX_INV_SZ in zcashd: https://github.com/zcash/zcash/blob/adfc7218435faa1c8985a727f997a795dcffa0c7/src/net.h#L50