I'm trying to get the new version of maildrop ready and they split out unicode support into a new library. The name of their archive is courier-unicode, but the actual name of the library installed is libunicode. That's what I picked after looking at a few other libs. I don't see any specific naming guidelines on this and I can see it going either way.
package review can bee seen here: https://bugzilla.redhat.com/show_bug.cgi?id=1186964