This uses now the same options which are used when starting wesnothd from within the wesnoth UI.
Systemd sandboxing has been added as well as an documentation entry.
The socket file seems to be not removed in most cases, thus it gets deleted afterwards.
* GNUInstallDirs is the only Kitware-supported
way to change the default directories. Most
distributions have hooks for changing these
directories, which makes integrating wesnoth
easier and more consistent with the rest of
the CMake ecosystem.
* Make build system perfectly out-of-source
compatible. The build system should never
touch files in the source tree.
