HEADS UP: new SLAPD Connection Management Infrastructure

["Kurt D. Zeilenga" <Kurt@OpenLDAP.org>]

I've committed changes to slapd's connection management infrastructure
designed to resolve two race conditions in SLAPD's front end.
	- ops after bind race may get old bind parameters
	- close race(s)

The code supports both threaded and non-threaded environments.

The code is preliminary.  Testing so far has been limited.
Known issues:
	- inetd support
	- cn=monitor counters

Both of these issues will be resolved soon.

Kurt