Issue 150+152 fix

LDAP objects couldn't be removed (user and shared folder deletion)
Problem was that the deleteflag in the ldap schema was not set
to EQUALITY booleanMatch.

In effect, ldap searches with the filter "deleteflag=TRUE"
could not be resolved by ldap.

Cyrus did however remove the objects. Only LDAP wasn't in sync.
Max is up-to-date regarding this bugfix.