Merge tag 'v3.9.0-rc2' into stable-3.9

Release 3.9.0-rc2

VERSION.cmake

@@ -1,6 +1,6 @@
 set( MIRALL_VERSION_MAJOR 3 )
 set( MIRALL_VERSION_MINOR 8 )
-set( MIRALL_VERSION_PATCH 81 )
+set( MIRALL_VERSION_PATCH 82 )
 set( MIRALL_VERSION_YEAR  2023 )
 set( MIRALL_SOVERSION 0 )