- extended paillier-api to also include caller-suggested maximum supported homs

git-svn-id: https://gnunet.org/svn/gnunet@32185 140774ce-b5e7-0310-ab8b-a85725594a96
- added caller-hom-ops soft-cap logics

git-svn-id: https://gnunet.org/svn/gnunet@32186 140774ce-b5e7-0310-ab8b-a85725594a96