Re: (ITS#8303) An Asynchronous meta back-end for OpenLDAP

[nivanova@symas.com]

This patch fixes a problem in the closing of timed-out connections to 
targets in back-asyncmeta. If a a_metaconn is still in use for another 
target, the connections to other targets might not be reset while the mc 
is still active, even if these targets are no longer in use. This patch 
introduces counters for pending operations per a_metasingleconn, and 
resets a metasingleconn if it has timed out and has no pending operations.

  ftp://ftp.openldap.org/incoming/nadezhda-ivanova-160229.patch