default sysconfdir subdirectory is openldap instead of ldap.
This removes conflicts with other ldap subsystems. Should
be configure option.
*.conf files are now preserved. A *.conf.default are always
created with the latest conf.
*.help and ldapfriendly are now placed in $(datadir)/$(ldap_subdir)
updated man pages to reflect changes.
Modified clients to reduce use of ldapconfig.h.edit.
ldap_{get,set}_option support is relatively complete. Needs
to be extended to support other "features" of OpenLDAP.
