Updates: command-line parsing of parameters for server, port and baseDN. Started ChangeLog, updated TODO and README.

	mail500 to use filters
	Kerberos autoconf support
	ISODE autoconf support
	contrib autoconf support

pointed out by Jorg Pietschmann <pietsch@swissline.ch>.

Modified users of this code to free matched if set.

now that the mktime check is commented out.

Clarify a few comments.

give "/foo", then it will check $HOME/foo, $HOME/./foo, then /foo.
This might not be what the installer hand it mind... but then again
may be it is.
w_userconf and w_conf both now use NULL arguments to disable conf loading.

Also modified openldap_ldap_init_w_userconf to not prepend a pathname
to filenames starting with "/" or "./".

the exact nature of the functionality being tested.  -DNO_THREADS
does NOT have a yield select, hence the macro is not defined.
The slapd/daemon code has been changed to test both no threads
and yielding select before using a timeout of NULL.

actually use -c option.