windows: Only consider us to be running as service if stderr is invalid.

Doc: Update logical decoding stats information.

Fix tests for replication slots stats.

Update replication statistics after every stream/spill.

Fix the computation of slot stats for 'total_bytes'.

Another try to fix the test case added by commit f5fc2f5b23.

Fix issues in pg_stat_wal.

Change data type of counters in BufferUsage and WalUsage from long to int64.

pgstat: store statistics in shared memory.

Fix memory lifetime issues of replication slot stats.

Close psql processes gracefully in recovery tests