Also list shared ciphers in find_by_user

[mprasil]

This splits the find_by_user into two separate functions: find_owned_by_user which retains previous functionality and lists only ciphers directly owned by user and find_by_user which now also lists all ciphers shared with user.

As a result shared ciphers are now visible in user's vault.

There's also small change in the /api/ciphers/purge handler to use the find_owned_by_user instead to only purge user's content and not the shared stuff.

[dani-garcia]

With some light testing I've noticed a bug: If a cipher is added to more than one collection, the method returns multiple copies of the cipher, which seems to break the web vault listing, you need to make sure that the method doesn't return duplicated ciphers.

You should also change the /accounts/delete handler to also use the new owned function as well.

[mprasil]

Well spotted! I'll have a look at that.

[mprasil]

I believe the bug should be fixed with distinct(). I've also updated /accounts/delete to use proper function.

BTW /accounts/delete and /ciphers/purge have a lot in common, I might look into moving the common functionality under cipher.rs in some later PR if you agree.

[dani-garcia]

Okay, I've tested it again and it works correctly now, so I'll merge this. If you want to reduce the duplication in those functions in another PR, i'm OK with it.