Update to version 2.0.6.

o Add buffer_compress_percentage
o server: fixup bug in sending jobs_eta command
o Avoid segfault if verify header appears longer than io_u
o Fix bug that causes early termination of fio with verify_backlog
o Add buffer_compress_chunk option
o Fix failure to verify in mixed read/write workload with backlog
o New offset_increment option
o Fix problem with iodepth_batch_complete=0 and accounting
o time_based: Avoid restarting main I/O loop
o Enable read/write sequential offset to be a non-multiple of the block size
o Added 99.95 and 99.99 default percentiles.
o Fix terse output with description set

Feature safe: yes