Resulting output is slightly different because AIX layout used to carry
ADX ADPCM hist between segments, but since ADX does have hist in header
(not parsed when AIX was implemented) this step is unneeded/incorrect
It was implemented for Audacious only to open companion NWA files, but
current version has no need for it. In case there is some obscure thing
that needs it, Audacious's vfs.cc should translate or return realnames
transparently, without having to modify other streamfiles.
