New i2pd release 2.52.0

[2.52.0] - 2024-05-12

Added

• Separate threads for persisting RouterInfos and profiles to disk
• Give preference to address with direct connection
• Exclude addresses with incorrect static or intro key
• Avoid two firewalled routers in the row in tunnel
• Drop unsolicited database search replies

Changed

• Increase number of hashes to 16 in exploratory lookup reply
• Reduce number of a RouterInfo lookup attempts to 5
• Reset stream RTO if outbound tunnel was changed
• Insert previously excluded floodfill back when successfully connected
• Increase maximum stream resend attempts to 9
• Reply to exploratory lookups with only confirmed routers if low tunnel build rate
• Don't accept too old RouterInfo
• Build client tunnels through confirmed routers only if low tunnel build rate
• Manage netDb requests more frequently
• Don't reply with closer than us only floodfills for lookup

Fixed

• Crash on router lookup if exploratory pool is not ready
• Race condition in excluded peers for next lookup
• Excessive number of lookups for same destination
• Race condition with transport peers during shutdown
• Corrupted RouterInfo files