Detect broken symlinks in the cache and fix them #1994
Merged
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Currently, when an external process deletes a file that a symlink is pointing to in the cache, but not the symlink itself, we will never fix that and the cache will be permanently broken.
This makes the
AdvertiseCachedFilesensitive to the possibility of links being broken. Broken links are removed and the advertisement process is retried to establish a functioning cache state again.