Bug 4289: 'OpacPublic' feature

Bug 4289: 'OpacPublic' feature

applied to git tag 'v3.02.00-rc'

Frédéric Demians:

  - Rebased this patch to HEAD
  - Solved a merge conflict
  - The patch works as described here:
    http://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=4289

Signed-off-by: Frédéric Demians <f.demians@tamil.fr>
Signed-off-by: Jared Camins-Esakov <jcamins@bywatersolutions.com>
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>