Peer review of code merge for XCP-ng 8.1

[stormi]

There were lots of conflicts (across 8 different files with several conflicts per file) when I merged the CH 8.1 installer codebase with ours. Most were due to a code cleaning operation Citrix devs have done, that overlap parts that we changed.

I have solved all conflicts manually using meld as a merge tool, but I may have introduced errors or failed to see changes in the codebase that would require changes in our specific code.

Thus I need someone to review my changes.

Suggested double check:

• check the diff between branch 8.0 and master. You'll see mostly Citrix changes.
• check the diff between branch XS and master. You'll see mostly our cumulated changes including a few adaptations I had to do to solve the conflicts.

[stormi]

Another way to do it, probably the best way in my eyes: create a test branch out of the 8.0 branch. Merge the XS branch into it. Solve the conflicts manually. Compare with my results in master branch.

[stormi]

Done by @Wescoeur