Fills in the property endrecOffset in za reference.
For each ArchiveMember2 structure in the directory, fills in
properties offset, compressionMethod, time,
crc32, compressedSize, expandedSize, name[],
Use readCompressedData() later to fill in the compressedData
Use expand2() later to uncompress the data for each ArchiveMember2.
Fills in the property endrecOffset in za reference. For each ArchiveMember2 structure in the directory, fills in properties offset, compressionMethod, time, crc32, compressedSize, expandedSize, name[], Use readCompressedData() later to fill in the compressedData Use expand2() later to uncompress the data for each ArchiveMember2.