Add mod_digest to ProFTPD

[hastdotwhat]

It would be really great to have mod_digest support added for ProFTPD. At the moment there's no way to verify that a file has been successfully transferred (or hasn't been corrupted when written to disk, or while held on disk) without copying the whole thing back again and comparing against the original. Unfortunately ProFTPD doesn't include this built-in (for some reason the capability is quite widely supported for Windows servers and pretty much unsupported for Unix ones). Installation is pretty simple, copy mod_digest.c into /contrib and then build ProFTPD as usual. Download link for mod_digest.c here.

(A note to the maintainers, I don't have access to a FreeBSD box to build it on, but give me half an hour of SSH access to a build machine and I'll make the changes for you .

[hastdotwhat]

It's been more than a year since I posted the above, it'd be really useful to have this in future releases and it seems like a really trivial change, just include one extra source file in the build step... (as I mentioned in my original message, I don't have access to a FreeBSD system to build it on or I'd do it myself).

[hastdotwhat]

This is my annual bump to get this capability added to Nas4Free's FTP server, it'd be really useful to have this added to both check for corruption during transfers and to avoid having to scan large files for changes on every backup run.