* crypto: support for revocation lists (CRLs) * dht: add per-ip-range storage ratio. This means a single IP or IP range won't be able to exhaust the DHT storage anymore. If storage is full, the oldest value of the most consuming IP range will be dropped * dht: drop values as soon as they expire * dht: better support for multiple listens on a single hash * dht: various optimisations * abi: symbols are not exported by default anymore * build: install in standard GNU directories by default to support multi-arch systems * python: properly check for Cython * python: small tools updates and fixes