1. Reads from external storage support now o_direct mode.
2. Simplify write unloading logic. Make pending buffer a ring buffer with
a predefined capacity.
3. Add more tiered stats to info command
1. Docker build now builds for arm64 as well.
2. Add bind option to specify on which interface the server should listen.
3. Automatically deduce maxmemory setting.
1. Basic support of sets and hsets. No intset or dict-based hset yet.
2. Make sure that rdbloader actually loads the data into shards.
3. Support object metadata like expiry time.
4. Support lists loading.
Roman Gershman