v2.45: Block Incremental Backup (BETA)

Bug Fixes:

* Skip writing recovery.signal by default for restores of offline backups. (Reviewed by Stefan Fercot. Reported by Marcel Borger.)

Features:

* Block incremental backup (BETA). (Reviewed by John Morris, Stephen Frost, Stefan Fercot.)

Improvements:

* Keep only one all-default group index. (Reviewed by Stefan Fercot.)

Documentation Improvements:

* Add explicit instructions for upgrading between 2.x versions. (Contributed by Christophe Courtois. Reviewed by David Steele.)
* Remove references to SSH made obsolete when TLS was introduced.

test/code-count/file-type.yaml

@@ -519,6 +519,14 @@ src/command/local/local.h:
   class: core
   type: c/h
 
+src/command/manifest/manifest.c:
+  class: core
+  type: c
+
+src/command/manifest/manifest.h:
+  class: core
+  type: c/h
+
 src/command/remote/remote.c:
   class: core
   type: c
@@ -583,6 +591,14 @@ src/command/restore/blockChecksum.h:
   class: core
   type: c/h
 
+src/command/restore/blockDelta.c:
+  class: core
+  type: c
+
+src/command/restore/blockDelta.h:
+  class: core
+  type: c/h
+
 src/command/restore/file.c:
   class: core
   type: c
@@ -819,6 +835,18 @@ src/common/crypto/md5.vendor.c.inc:
   class: core/vendor
   type: c
 
+src/common/crypto/xxhash.c:
+  class: core
+  type: c
+
+src/common/crypto/xxhash.h:
+  class: core
+  type: c/h
+
+src/common/crypto/xxhash.vendor.c.inc:
+  class: core/vendor
+  type: c
+
 src/common/debug.c:
   class: core
   type: c
@@ -2371,6 +2399,10 @@ test/src/module/command/localTest.c:
   class: test/module
   type: c
 
+test/src/module/command/manifestTest.c:
+  class: test/module
+  type: c
+
 test/src/module/command/remoteTest.c:
   class: test/module
   type: c