2.22.5 bugfix release

* Use a single function to handle the copy of the game binary into the prefix.
* Fix permissions on the manual pages.
* Add support for more native libraries dependencies:
  - libc++.so.1
  - libc++abi.so.1
  - libpcre.so.3
* Arch Linux: Improve listing of packages providing generic dependencies.
* Arch Linux: Prevent querying of unset variables.