Also, match the full path to the special nologin shell.

Previously, it would recognize it as a valid shell only
if the basename (nologin) was specified. Now, it will
recognize both the basename and the full path.

NOTE: The full path as adduser(8) understands it is /usr/sbin/nologin.
      There is a symlink, /sbin/nologin, but that's deprecated and
      only there for backwards compatibility.

usr.sbin/adduser/adduser.sh

@@ -142,7 +142,8 @@ fullpath_from_shell() {
 	done
 
 	# /usr/sbin/nologin is a special case
-	if [ "$_shell" = "${NOLOGIN}" ]; then
+	if [ "$_shell" = "${NOLOGIN}" -o \
+	    "$_shell" = "${NOLOGIN_PATH}" ]; then
 		echo ${NOLOGIN_PATH}
 		return 0;
 	fi