v2.53: Concurrent Backups

IMPORTANT NOTE: The log-level-stderr option default has been changed from warn to off. This makes it easier to capture errors when only redirecting stdout. To preserve the prior behavior set log-level-stderr=warn.

NOTE TO PACKAGERS: The lz4 library is now required by the meson build.

NOTE TO PACKAGERS: Compiler support for __builtin_clzl() and __builtin_bswap64() is now required by the meson build.

Bug Fixes:

* Fix SFTP renaming failure when file already exists. (Fixed by Reid Thompson. Reviewed by David Steele. Reported by ahmed112212.)

Features:

* Allow backups to run concurrently on different repositories. (Reviewed by Reid Thompson, Stefan Fercot.)
* Support IP-based SANs for TLS certificate validation. (Contributed by David Christensen. Reviewed by David Steele.)

Improvements:

* Default log-level-stderr option to off. (Reviewed by Greg Sabino Mullane, Stefan Fercot.)
* Allow alternative WAL segment sizes for PostgreSQL ≤ 10. (Contributed by Viktor Kurilko. Reviewed by David Steele.)
* Add hint to check SFTP authorization log. (Contributed by Vitalii Zurian. Reviewed by Reid Thompson, David Steele.)

Documentation Improvements:

* Clarify archive-push multi-repo behavior. (Reviewed by Stefan Fercot.)

test/code-count/file-type.yaml

@@ -631,6 +631,10 @@ doc/xml/release/2024/2.51.xml:
   class: doc/source
   type: xml
 
+doc/xml/release/2024/2.52.1.xml:
+  class: doc/source
+  type: xml
+
 doc/xml/release/2024/2.52.xml:
   class: doc/source
   type: xml
@@ -1059,6 +1063,14 @@ src/command/local/local.h:
   class: core
   type: c/h
 
+src/command/lock.c:
+  class: core
+  type: c
+
+src/command/lock.h:
+  class: core
+  type: c/h
+
 src/command/manifest/manifest.c:
   class: core
   type: c
@@ -2955,6 +2967,10 @@ test/src/module/command/localTest.c:
   class: test/module
   type: c
 
+test/src/module/command/lockTest.c:
+  class: test/module
+  type: c
+
 test/src/module/command/manifestTest.c:
   class: test/module
   type: c