CaFormatExcludeFile

[tomberek]

With #113 resolved, the remaining differences between casync and desync produced .caidx/.catar files are flags. Most can be resolved by being very explicit with casync:

casync make --with=unix \
                      --with=xattrs \
                      --with=nsec-time \
                      --without=16bit-uids \
                      --with=32bit-uids \
                      --chunk-size=16384:65536:262144 \
                      casync.catar /data-ro/temp

The last flag missing is CaFormatExcludeFile. With these changes and a correct file order, produced caidx/catar are bit-identical to casync.