Output of create_jailkit scripts is hidden/discarded, no error control
Th jailkit scripts are very prone to fail due to very different reasons(like wrong permissions or binaries missing), which may result in a complete failure to create the functional jail kit; they still provide usefull error output which could give a hint about what is going on. For some reason this output is not shown in ispconfig logs even in debug mode, which makes it rather hard to investigate. Please make that output to be displayed in the log.