Prevent executing of several actions (e.g. mail, send-mail etc) on restart (bans were already notified).
Test cases extended (smtp and by restart in ServerReloadTest).
Closes gh-1141
Closes gh-921
added helper "action.d/helpers-common.conf", and `_grep_logs` part-command for actions needed grep logs from multiple log-files
test cases: executing of some complex actions covered