sysutils/fusefs-xfs: update to 0.4.3

[asomers]

Summary

Version 0.1.0 was more of a "technology preview". The current version
contains many bug fixes and works with most real-world datasets.

Also, take maintainership, because I've also assumed upstream
maintainership.

Sponsored by: Axcient

[asomers]

Note, this was reviewed by @fuz , who gave his approval over IRC, but was unable to login to Phabricator at the time.