Unable to find the details of bug fix in 9.6.x minor version.

Hi Team,

I am seeing in postgresql release notes that below bugs are fix in 9.6.x
version but unable to find the details for about that bug .

*Fixed in 9.6.11*

Fix unexpected timeouts when using wal_sender_timeout on a slow server
(Noah Misch) .

*Fixed in 9.6.12*

1. A new server parameter data_sync_retry has been added to control this;
if you are certain that your kernel does not discard dirty data buffers in
such scenarios, you can set data_sync_retry to on to restore the old
behavior.
2. Fix logic for stopping a subset of WAL senders when synchronous
replication is enabled
3. Make the archiver prioritize WAL history files over WAL data files while
choosing which file to archive next

*Fixed in 9.6.16*

Ensure that temporary WAL and history files are removed at the end of
archive recovery.

Avoid unwanted delay during shutdown of a logical replication walsender.

*Fixed in 9.6.17*

Fix failure in logical replication publisher after a database crash and
restart

*Fixed in 9.6.18:*

This can eliminate many attempts to fetch non-existent WAL files from
archive storage, which is helpful if archive access is slow.

Regards,
Sameer Malve