Cache of clear- to chiphertextDirectory mapping contains invalid entries

[infeo]

To map (virtual) cleartext paths to actual ciphertext paths on the filesystem (e.g. /foo/bar -> /d/00/92jALKJSPPOI...) the class CryptoPathMapper is used.

Inside the class a cache is used for frequent clear->cipher mappings to prevent expensive IO operations. If a path is deleted or moved, the cache must be cleared of such a mapping and of all child mappings.

In the current implemenation this is not the case:

cryptofs/src/main/java/org/cryptomator/cryptofs/CryptoPathMapper.java

Lines 142 to 151 in a1ea3bc

	public void invalidatePathMapping(CryptoPath cleartextPath) {
	ciphertextDirectories.asMap().remove(cleartextPath);
	}
	public void movePathMapping(CryptoPath cleartextSrc, CryptoPath cleartextDst) {
	var cachedValue = ciphertextDirectories.asMap().remove(cleartextSrc);
	if (cachedValue != null) {
	ciphertextDirectories.put(cleartextDst, cachedValue);
	}
	}

Only the mapping of the deleted/moved cleartext directory itself is removed, but no children. Hence, the cache contains invalid entries, leading to unexpected errors.