- regenerated autoconf/automake/libtool related files

add (basic) support for {RADIUS} scheme; userPassword attributes prefixed with {RADIUS} are interpreted as RADIUS userids and authentication occurs contacting the configured RADIUS servers with that userid and the provided password (experimental; please report)

- throw Exception in initialization error

Do not use test -a/-o.  Use shell features like &&, || or case...esac.
Use grep instead of egrep (but not the not-yet-portable Posix variant grep -E).
Based on a patch from Paul Eggert.