The latter one caused sounds in mods not being properly cached (and not
played), if the internal mod path started with "./", which is the case
on windows since an earlier commit.
Apparently this was half implemented but not fully finished.
Mono samples work fine, for stereo, L/R panning does not work (due to OpenAL's limitation)
Also fixed: entity sounds should not play if a cutscene is currently skipped.
