rejected, your debian/copyright file is incomplete and misses
(C)holders/license data. You have to include all such differences.
Like - BSD/MIT style license headers in various files, api/epplet.h
pointing to a non-existing COPYING file and maybe more, but I leave the
fun of discovering all of them to you. :)
If you don't understand why your files were rejected, or if the
override file requires editing, reply to this email.