Fix build error on some system (Fedora 32). (Tatsuo Ishii)

Fix unnecessary checks. (Tatsuo Ishii)

Doc: Fix typo. (Tatsuo Ishii)

Fix for segmentation fault in PCP process. (bug 598) (Muhammad Usama)

Doc: Fix typo. (Tatsuo Ishii, Bo Peng)

Fix possible data inconsistency in native replication mode. (Tatsuo Ishii)

Fix watchdog ping probes fail with long hostnames due to small buffer. (bug 516) (Bo Peng)