This patch makes adjustments in admin/z3950servers in order to insert,
edit and delete SRU server records.
Test plan:
Add, edit, copy and delete SRU server.
Check if adding, editing, copying and deleting Z3950 servers still works.
Signed-off-by: Giuseppe Angilella <giuseppe.angilella@ct.infn.it> Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com> Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>