* libxbps: while running INSTALL/REMOVE scripts, do not fail if a script
returns ENOENT but the script exists; that means the script did not match
the expected action on its switch statement and the fact can be simply
ignored.
* libxbps: while upgrading packages and searching for obsolete files,
do not remove the files that did not match previous SHA256 hash. Also,
only remove obsolete dangling symlinks.
76ca32e76f