Partly import changes from !28

MR !28 was too big and difficult to review, with over 1000+ changed files and 33,632 lines changed.

It also had some instances where it would remove "ManaPlus Developers" with "ManaVerse Developers" and other salad.

So I decided to break it into more manageable chunks, even if they're not so coherent themselves.

This is the first chunk ─ it updates some static files, but not their names nor the executable names (this is still overriding ManaPlus when installed). It updates some contacts. It does some of the cleanup !28 had nested on it.

As it got close to 40 changed files, I decided to call it a chunk. You can find the largest ─ and less meaningful ─ chunk in !43 (merged) which contains copyright header changes.

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Notable contents

• Eliminate data/evol (cleanup)
• Remove .cirrus.yml (cleanup)
• Partly update contact information on CMake, Debian
• Update some of client ingame help files
• Update some of client static help files (e.g. INSTALL and README)
• Update pkgbuild
• Remove Evol, LoF and GTMW from the test serverlist (cleanup)
• Update some unused packaging scripts (cleanup)
• Fix the "download a newer client" link
• Fix window title on SDL2 (new!)
• Ignore "Broken nick detected" debug message on TMWA (new!)
• Replace splash screen copyright header based on Mana precedent (new!)
• Update --help and screenshots ManaVerse branidng (new!)