Drop 0021-tools-xl-bash-completion-also-complete-xen.patch ?

The 'xen' command is (now) only an alias for 'xl'. I personally don't see any added benefit, a potential source of issues (albeit likely not big) and/or confusion and it's a diversion from upstream without any benefit (imo).

A simple line in the release notes #25 should be sufficient.

btw: "Please review the contribution guidelines for this project." shows guidelines for upstream contributions