Merge tag '6.6.4-release' of https://github.com/secondlife/viewer into heimdall

autobuild.xml

indra/llaudio/llaudioengine.cpp

indra/llaudio/llaudioengine.h

indra/llaudio/llaudioengine_fmodstudio.cpp

indra/llaudio/llaudioengine_openal.cpp

indra/llaudio/llstreamingaudio_fmodstudio.cpp

indra/llcharacter/llbvhloader.cpp

indra/llcommon/llalignedarray.h

indra/llcommon/llcoros.cpp

indra/llcommon/llcoros.h

indra/llcommon/llprocessor.cpp

indra/llcommon/llprocessor.h

indra/llcommon/llsys.cpp

indra/llcommon/llsys.h

indra/llfilesystem/lldiskcache.cpp

indra/llfilesystem/lldiskcache.h

indra/llinventory/llparcel.cpp

indra/llinventory/llparcel.h

indra/llmath/llvolume.cpp

indra/llmessage/llavatarnamecache.cpp