- [GH2689] fix the bug that newly joined member may panic

- [GH2705] fix the bug that stats may be updated before it is initialized
- [GH2749] fix the typo in the string representation of raftLog
- [GH2743] fix connection leak in proxy mode
- [GH2751 GH2811] support filelock for solaris and plan9
- [GH2756] improve the reliability of `etcdctl member remove`
- [GH2758] improve the disaster recovery guide
- [GH2761] demand users to set -advertise-client-urls explicitly for better usage
- [GH2560] print out more version informantion

- proxy shuffles endpoints to avoid being stuck to one member

- stop using resolved address to avoid TLS failure
- fix the bug that machine power-off might lead to corrupted wal
- fix the bug that etcdserver.Send does not print correct error log for messages to removed members
- etcdctl backup tool uses new file layout
- fix the bug that PUT request with prevExist=true and prevIndex/prevValue set is not parsed to CompareAndSwap
- fix the bug that etcd failed to recovery from recoverable WALs
- improve etcdctl help doc by adding ‘extended’ to output format

- etcd watchers no longer hang under when many watchers watch the sam…

…e key

- etcdctl now support import hidden keys from the given snapshot

- add 'etcdctl import' command to import the migration snap generated…

… in v0.4.8 etcd to 2.0 etcd cluster

- etcdctl takes an additional 2379, which is the IANA port of etcd client URL, as the default port
- etcd no longer builds debugging tools into bin/ directory

- revert allow_legacy related stuffs

- introduce /v2/migration/snapshot endpoint

- fix the bug that wal file is not removed in time

- support bootstrap etcd using non-empty data directory
- check given flags when join existing cluster
- check that etcd parses all arguments

- support IPv6 address in url flags

- allow user provide a name without initial-cluster update
- restrict that election timeout should be much bigger than heartbeat internval
- improve the documentation about unsafe flags
- fix the documentation about starting raft node
- fix the bug that proxy fails to restart
- fix the bug when cloning store stats
- remove starter code

- add --internal-dir flag to run legacy mode

- fix the config documentation about --bind-addr and --peer-bind-addr

- Fix a minor voting issue in raft. Under unique scenarios it was pos…

…sible that two nodes in a raft cluster could be elected leader for a specific term.

- Fix unexpected HTTPS to HTTP downgrade when TLS certs and keys are not provided.
- Fix an early file unlock issue in WAL. This fix was done to improve safety of the etcd WAL implementation in preparation for the etcd 2.1.0 release.
- Fix frequent i/o timeout issues during peer communication.
- Improved documentation around setting up an etcd cluster.