Upstream changes:
0.58: Nov 25, 2018
- on inflate error, first return any remaining bytes before returning the error.
- remove leading "./" even if ac->currentDir[] is not set; change mirrors a
change in rsync-bpc and has no effect here since BackupPC::XS doesn't set
ac->currentDir[].
- bpc_attrib_dirWrite() updates dir->digest with new digest.
- updated configure.sh with package name and current version