PostgreSQL 15 RC 2

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+The PostgreSQL Global Development Group announces that the first release
+candidate of PostgreSQL 15 is now available for download. As a release
+candidate, PostgreSQL 15 RC 2 will be mostly identical to the initial release of
+PostgreSQL 15, though some more fixes may be applied prior to the general
+availability of PostgreSQL 15.
+
+The planned date for the general availability of PostgreSQL 15 is still
+October 13, 2022, but may be pushed to October 20, 2022 based on what issues are
+reported. Please see the "Release Schedule" section for more details.
+
+Upgrading to PostgreSQL 15 RC 2
+-------------------------------
+
+To upgrade to PostgreSQL 15 RC 2 from earlier versions of PostgreSQL, you will
+need to use a major version upgrade strategy, e.g. `pg_upgrade` or
+`pg_dump` / `pg_restore`. For more information, please visit the documentation
+section on [upgrading](https://www.postgresql.org/docs/15/static/upgrading.html):
+
+[https://www.postgresql.org/docs/15/static/upgrading.html](https://www.postgresql.org/docs/15/static/upgrading.html)
+
+Changes Since 15 RC 1
+----------------------
+
+Several bug fixes were applied for PostgreSQL 15 during the RC 1 period. These
+include:
+
+* Reverting the "optimized order of `GROUP BY` keys" feature.
+* Fix behavior for the `\g` command in `psql` with multi-command strings.
+* Fix memory leak in single-column sorts.
+* Fix for behavior of `PQsslAttribute` libpq function.
+
+For a detailed list of fixes, please visit the
+[open items](https://wiki.postgresql.org/wiki/PostgreSQL_15_Open_Items#resolved_before_15rc2)
+page.
+
+Release Schedule
+----------------
+
+This is the second release candidate for PostgreSQL 15. Unless an issue is
+discovered that warrants a delay or to produce an additional release candidate,
+PostgreSQL 15 should be made generally available on October 13, 2022 or
+October 20, 2022.
+
+For further information please see the
+[Beta Testing](https://www.postgresql.org/developer/beta/) page.
+
+Links
+-----
+
+* [Download](https://www.postgresql.org/download/)
+* [Beta Testing Information](https://www.postgresql.org/developer/beta/)
+* [PostgreSQL 15 RC 1 Release Notes](https://www.postgresql.org/docs/15/static/release-15.html)
+* [PostgreSQL 15 Open Issues](https://wiki.postgresql.org/wiki/PostgreSQL_15_Open_Items)
+* [Submit a Bug](https://www.postgresql.org/account/submitbug/)
+* [Follow @postgresql on Twitter](https://www.twitter.com/postgresql)