[Libguestfs] [PATCH libguestfs 0/3] daemon: Fix various commands which break on NTFS-3g compressed files.

https://bugzilla.redhat.com/show_bug.cgi?id=1811539 Commands including virt-diff which read extended attributes will sometimes fail on NTFS filesystems that are using system compressed. The reason is complex, see comment 5 of the bug linked above. This patch filters out the troublesome xattr. For justification, see the comment I added in patch 3. Patch 1 & 2 are refactoring. I was on the verge of rewriting the whole file in OCaml, but OCaml doesn't have access to the relevant system calls so it would have been a bunch more work and not necessarily any simpler. Thanks: Yongkui Guo for identifying the bug. Rich.