bugfix: init-function for rtmgr --load should be given by --init-func on rtshell 3.0.0
bugfix: init-function for rtmgr --load should be given by --init-func on rtshell 3.0.0

hyaguchijsk/rtmext,hyaguchijsk/rtmext,hyaguchijsk/rtmext,hyaguchijsk/rtmext