do not try to revert renamed files if the source name is not known
tree1aebb589714d47f19820f2d8e6f9c7fadd58d9f9
-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