Save attachments in account-specific folders
Related (but different): #298
I'd also like to make a PR to save in different folders for every conversation, but that looks slightly more involved so I'll open a new PR if I get around it, if that's fine for you.
This seems to me like a good idea, but I'm wondering if the directory structure should be:
.local/share/signal-cli/data/PHONENUMBER.d/attachments
I'm open to any other naming scheme that will please @AsamK.
One problem I see is backward compatibility. A message reading program (like my signalmail) should delete the attachment when the message is handled, so any such program will break.