- upgrade to 2.2.51
- Test fixes

- upgrade to 2.2.50
- OPTIONS in man pages should be a section heading, not a subsection heading
- Fix a typo in the setfacl man page
- setfacl: Clarify that removing a non-existent acl entry is not an error
- Prevent setfacl --restore from SIGSEGV on malformed restore file
- setfacl: make sure that -R only calls stat(2) on symlinks when it needs to
- libacl: fix potential null pointer dereference
- setfacl: fix restore crash on malformed input
- setfacl: print useful error from read_acl_comments
- setfacl: changing owner and when S_ISUID should be set --restore fix