(ITS#4986) manageDSAit might control cause problems in database selection

[nvoutsin@noc.uoa.gr]

Full_Name: Nikos Voutsinas
Version: 2.3.35
OS: Solaris 9
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (195.134.100.207)


With the following configuration, search operations in the local database
("dc=foo,dc=bar") will fail when manageDSAit control is set.  

....
....
backend bdb
database        bdb
suffix          "dc=foo,dc=bar"
rootdn          "uid=manager,dc=foo,dc=bar"
rootpw          "secret"
directory       /var/openldap/bdb
access to * by * read

database        relay
suffix          ""
relay           "dc=foo,dc=bar" massage
access to * by * read
....
....

The problem has been tracked down in select_backend().