Frank 0e2cd1a64d Added clear subcommand for control lock (#3013)
Added clear subcommand for control lock with following options:

```
  3. Clear lock named 'bucket/object' (exact match).
    $ minio control lock clear http://localhost:9000/bucket/object

  4. Clear all locks with names that start with 'bucket/prefix' (wildcard match).
    $ minio control lock --recursive clear http://localhost:9000/bucket/prefix

  5. Clear all locks older than 10minutes.
    $ minio control lock --older-than=10m clear http://localhost:9000/

  6. Clear all locks with names that start with 'bucket/a' and that are older than 1hour.
    $ minio control lock --recursive --older-than=1h clear http://localhost:9000/bucket/a
```
2016-10-20 13:15:28 -07:00
..
2016-10-14 19:57:40 -07:00
2016-09-29 23:42:10 -07:00
2016-08-24 22:54:34 -07:00
2016-10-13 09:25:56 -07:00
2016-10-13 09:25:56 -07:00