(ITS#4563) back-sql returns success from noop

[h.b.furuseth@usit.uio.no]

Full_Name: Hallvard B Furuseth
Version: HEAD
OS: 
URL: 
Submission from: (NULL) (129.240.186.42)
Submitted by: hallvard


Back-sql supports the noop control, but as far as I can tell from
the code it returns LDAP_SUCCESS instead of LDAP_X_NO_OPERATION
for update operations.  I can't test it though.