(ITS#5854) Double send response in meta backend

Full_Name: Jorge Perez Burgos Version: 2.4.11 OS: SLES 10 URL: ftp://ftp.openldap.org/incoming/back-meta_changes.diff.gz Submission from: (NULL) (194.237.142.20)

Meta backend send two response codes when trying to reconnect to other slapd.

Steps to reproduce: Configure two slapds, slapd_A and slapd_B. slapd_A connects to slapd_B trough meta backend. Do some traffic operations. Restart slapd_B and do some modify, delete or add operation, response code 52 is received although the operation is sucessful. Using a tcpdump you can see two response codes for the request.

I attach a possible patch for this issue.