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The ZipArchive class now supports being created with an AbstractFile that does not provide a seekable stream upon both OpenRead and OpenWrite. When reading, the file is first copied to the TempFolder in a temp file. When writing, by the way we first create compressed file copies in the TempFolder, seeking was never required, but we must emulate "get_Position" for header offsets.
Corrected an issue where time stamps changed if Password/Encryption was used.