Fix TortoiseIDiff build error and upgrade to 21831
tree1381825dda16f875fa3efababaf29f531d69ff38
-rw-r--r-- 596 .gitignore
-rw-r--r-- 550 .gitmodules
drwxr-xr-x - Languages
-rw-r--r-- 3425 build.txt
drwxr-xr-x - common
drwxr-xr-x - contrib
drwxr-xr-x - doc
drwxr-xr-x - ext
-rw-r--r-- 145 release.txt
drwxr-xr-x - src
drwxr-xr-x - test