This version fixes various bugs in 2.2.4 or before.

• Fix connection_count_down(). It decrements the connection counter too much in some corner cases and causes online recover never completes(Tatsuo)

• Detect frontend exiting while waiting for commands complete in other cases such as internal locks are issued and Parse (Tatsuo)

• Fix inifinit loop in reset_backend(Xavier Noguer, Tatsuo)

• Fix Parse() to print actual query when it detects kind mismatch error(Tatsuo)

See NEWS and ChangeLog for more details.