Relocated fileidentifer_t and the DFILE* wrapped file list from engine/portable/src/sys_filein.c to engine/portable/src/fs_main.c
Refactored F_OpenLump moving it out of the stream abstraction layer up the hierarchy to the same level as F_Open. Both F_Open and F_OpenLump now call F_OpenStreamLump (when source is determined to be a lump in WadFile/ZipFile) removing an unnecessary entrypoint in the abstraction layer.
engine/portable/src/sys_filein.c to engine/portable/src/fs_main.c
up the hierarchy to the same level as F_Open. Both F_Open and
F_OpenLump now call F_OpenStreamLump (when source is determined
to be a lump in WadFile/ZipFile) removing an unnecessary entrypoint
in the abstraction layer.