HEADS UP: installation changes

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

I've made a couple of installation changes:
  * conf files are now PRESERVED!
  * install subdir for conf files is no longer hardcoded
	$sysconfdir/$ldap_subdir
  * data files (*.help, ldapfriendly) have been moved to
	$datadir/$ldap_subdir
  * ldap_subdir default is now 'openldap' instead of 'ldap'
  * --with-subdir added to configure.in to allow $ldap_subdir
	to set to an alternative subdirectory.
  * --without-subdir will set $ldap_subdir to be empty

The --with-subdir option should be used with care.  I
recommend folks just use the new subdirectories and
create symlinks if necessary to provide access to the
old subdirectory and/or data files.

Kurt