v2.33: Multi-Repository and GCS Support

Bug Fixes:

* Fix option warnings breaking async archive-get/archive-push. (Reviewed by Cynthia Shang. Reported by Lev Kokotov.)
* Fix memory leak in backup during archive copy. (Reviewed by Cynthia Shang. Reported by Christian ROUX, Efremov Egor.)
* Fix stack overflow in cipher passphrase generation. (Reviewed by Cynthia Shang. Reported by bsiara.)
* Fix repo-ls / on S3 repositories. (Reviewed by Cynthia Shang. Reported by Lesovsky Alexey.)

Features:

* Multiple repository support. (Contributed by Cynthia Shang, David Steele. Reviewed by Stefan Fercot, Stephen Frost.)
* GCS support for repository storage. (Reviewed by Cynthia Shang.)
* Add archive-header-check option. (Reviewed by Stephen Frost, Cynthia Shang. Suggested by Hans-Jürgen Schönig.)

Improvements:

* Include recreated system databases during selective restore. (Contributed by Stefan Fercot. Reviewed by Cynthia Shang.)
* Exclude content-length from S3 signed headers. (Reviewed by Cynthia Shang. Suggested by Brian P Bockelman.)
* Consolidate less commonly used repository storage options. (Reviewed by Cynthia Shang.)
* Allow custom config-path default with ./configure --with-configdir. (Contributed by Michael Schout. Reviewed by David Steele.)
* Log archive copy during backup. (Reviewed by Cynthia Shang, Stefan Fercot.)

Documentation Improvements:

* Update reference to include links to user guide examples. (Contributed by Cynthia Shang. Reviewed by David Steele.)
* Update selective restore documentation with caveats. (Reviewed by Cynthia Shang, Stefan Fercot.)
* Add compress-type clarification to archive-copy documentation. (Reviewed by Cynthia Shang, Stefan Fercot.)
* Add compress-level defaults per compress-type value. (Contributed by Cynthia Shang. Reviewed by David Steele.)
* Add note about required NFS settings being the same as PostgreSQL. (Contributed by Cynthia Shang. Reviewed by David Steele.)

test/code-count/file-type.yaml

@@ -203,6 +203,10 @@ src/build/config.sub:
   class: build
   type: make
 
+src/build/config/config.yaml:
+  class: build
+  type: yaml
+
 src/build/configure.ac:
   class: build
   type: make
@@ -675,14 +679,6 @@ src/common/encode.h:
   class: core
   type: c/h
 
-src/common/encode/base64.c:
-  class: core
-  type: c
-
-src/common/encode/base64.h:
-  class: core
-  type: c/h
-
 src/common/error.auto.c:
   class: core/auto
   type: c
@@ -883,6 +879,14 @@ src/common/io/http/session.h:
   class: core
   type: c/h
 
+src/common/io/http/url.c:
+  class: core
+  type: c
+
+src/common/io/http/url.h:
+  class: core
+  type: c/h
+
 src/common/io/io.c:
   class: core
   type: c
@@ -1467,6 +1471,34 @@ src/storage/cifs/storage.h:
   class: core
   type: c/h
 
+src/storage/gcs/read.c:
+  class: core
+  type: c
+
+src/storage/gcs/read.h:
+  class: core
+  type: c/h
+
+src/storage/gcs/storage.c:
+  class: core
+  type: c
+
+src/storage/gcs/storage.h:
+  class: core
+  type: c/h
+
+src/storage/gcs/storage.intern.h:
+  class: core
+  type: c/h
+
+src/storage/gcs/write.c:
+  class: core
+  type: c
+
+src/storage/gcs/write.h:
+  class: core
+  type: c/h
+
 src/storage/helper.c:
   class: core
   type: c
@@ -1767,6 +1799,10 @@ test/lib/pgBackRestTest/Env/Host/HostDbTest.pm:
   class: test/harness
   type: perl
 
+test/lib/pgBackRestTest/Env/Host/HostGcsTest.pm:
+  class: test/harness
+  type: perl
+
 test/lib/pgBackRestTest/Env/Host/HostS3Test.pm:
   class: test/harness
   type: perl
@@ -2167,6 +2203,10 @@ test/src/module/storage/cifsTest.c:
   class: test/module
   type: c
 
+test/src/module/storage/gcsTest.c:
+  class: test/module
+  type: c
+
 test/src/module/storage/posixTest.c:
   class: test/module
   type: c