+ ddc_opt.pod typo fix
* ddc_dump: fixed missing c_str() in printf format
+ updated READMEs
+ upload-release.sh updated
+ tagged ddc-2.2.0
* preparing v2.2.0 release
* v2.2.0-pre2: disable jemalloc by default
* v2.2.0-pre1: rollback bogus commit (tagged as v2.2.0-pre2)
+ tagged ddc-2.2.0-pre2