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The new appendix groups information on renamed or removed settings, commands, etc into an out-of-the-way part of the docs. The original id elements are retained in each subsection to ensure that the same filenames are produced for HTML docs. This prevents /current/ links on the web from breaking, and allows users of the web docs to follow links from old version pages to info on the changes in the new version. Prior to this change, a link to /current/ for renamed sections like the recovery.conf docs would just 404. Similarly if someone searched for recovery.conf they would find the pg11 docs, but there would be no /12/ or /current/ link, so they couldn't easily find out that it was removed in pg12 or how to adapt. Index entries are also added so that there's a breadcrumb trail for users to follow when they know the old name, but not what we changed it to. So a user who is trying to find out how to set standby_mode in PostgreSQL 12+, or where pg_resetxlog went, now has more chance of finding that information. Craig Ringer and Stephen Frost Reviewed-by: Euler Taveira Discussion: https://postgr.es/m/CAGRY4nzPNOyYQ_1-pWYToUVqQ0ThqP5jdURnJMZPm539fdizOg%40mail.gmail.com Backpatch-through: 10
PostgreSQL Database Management System ===================================== This directory contains the source code distribution of the PostgreSQL database management system. PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings. PostgreSQL has many language interfaces, many of which are listed here: https://www.postgresql.org/download/ See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.