PG11 RC 1 draft

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+PostgreSQL 11 RC 1 Released
+===========================
+
+The PostgreSQL Global Development Group announces that the first release
+candidate of PostgreSQL 11 is now available for download. As a release
+candidate, PostgreSQL 11 RC 1 should be identical to the initial release of
+PostgreSQL 11, though some more fixes may be applied prior to the general
+availability of PostgreSQL 11.
+
+Upgrading to PostgreSQL 11 RC 1
+-------------------------------
+
+To upgrade to PostgreSQL 11 RC 1 from Beta or an earlier version of
+PostgreSQL 11, you will need to use a strategy similar to upgrading between
+major versions of PostgreSQL (e.g. `pg_upgrade` or `pg_dump` / `pg_restore`).
+For more information, please visit the documentation section on
+[upgrading](https://www.postgresql.org/docs/11/static/upgrading.html).
+
+Changes Since 11 Beta 4
+-----------------------
+
+There have been many bug fixes for PostgreSQL 11 reported during the Beta 4
+period and applied to this release candidate. These fixes include:
+
+* Fix a crash that occurred with event triggers on partitioned tables
+* Ensure the `transaction_timestamp` function returns an updated timestamp in
+a stored procedure if it is called after a transaction is committed
+* Disallow multiple primary keys to be created on partitions
+* Fix for `ALTER TABLE .. ATTACH PARTITION`
+
+For a detailed list of fixes, please visit the
+[open items](https://wiki.postgresql.org/wiki/PostgreSQL_11_Open_Items#resolved_before_RC1)
+page.
+
+Release Schedule
+----------------
+
+This is the first release candidate for PostgreSQL 11. Unless an issue is
+discovered that warrants a delay or to produce an additional release candidate,
+PostgreSQL 11 should be made generally available on October 18, 2018.
+
+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 11 RC Release Notes](https://www.postgresql.org/docs/11/static/release-11.html)
+* [PostgreSQL 11 Open Issues](https://wiki.postgresql.org/wiki/PostgreSQL_11_Open_Items)
+* [Submit a Bug](https://www.postgresql.org/account/submitbug/)