Point release - enforce -s/--source use for tagging/checksum options.

Only one change, but I realized I kept forgetting to set -s explicitly for -A, -C, -S, -M, -G, -T, -I, -V tagging or checksum options. That's actually quite dangerous to your collection, particularly when using something like -I or -T, and I'd made that mistake enough times to realize I had to enforce -s explicit use for these.

That's all, have a nice day.