Fix a couple of unsigned integer overflow bugs

Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild

Fix a few low severity security bugs including
An off-by-one overflow when reading compressed integers from a
Error handling being skipped when the number of bytes read doesn't
Not freeing memory when attempting to reallocate to size 0

Add option to generate a zchunk header from an uncompressed file without

Fix test compatibility with zstd-1.5.4

Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild

Fixed some small formatting issues

Rebuilt for https://fedoraproject.org/wiki/Fedora_37_Mass_Rebuild

Fixed a number of small issues highlighted by Coverity

Fixed bug that limited size of file that could be compressed using zchunk to 2GB
Fixed memory leak

Add `--uncompressed` option to zck, allowing for embedding of uncompressed
Various small bug fixes

Rebuilt for https://fedoraproject.org/wiki/Fedora_36_Mass_Rebuild