Packaging: Auto-generate changelog during configure (openzfs#15528)

Auto-generate changelog based off on @Version@ during configure,
so that it is not needed to be update with new releases / version
updates.

Signed-off-by: Umer Saleem <[email protected]>
Reviewed-by: Tony Hutter <[email protected]>

Author: Umer Saleem

.gitignore

@@ -83,6 +83,7 @@
 modules.order
 Makefile
 Makefile.in
+changelog
 *.patch
 *.orig
 *.tmp

configure.ac

@@ -67,6 +67,7 @@ ZFS_AC_DEBUG_INVARIANTS
 
 AC_CONFIG_FILES([
 	contrib/debian/rules
+	contrib/debian/changelog
 	Makefile
 	include/Makefile
 	lib/libzfs/libzfs.pc

contrib/debian/changelog renamed to contrib/debian/changelog.in

@@ -1,3 +1,9 @@
+openzfs-linux (@VERSION@-1) unstable; urgency=low
+
+  * OpenZFS @VERSION@ is tagged.
+
+ -- Umer Saleem <[email protected]>  Wed, 15 Nov 2023 15:00:00 +0500
+
 openzfs-linux (2.2.0-0) unstable; urgency=low
 
   * OpenZFS 2.2.0 is tagged.