BProcess: do not allow sending signals to a process from the handler when it has already terminated and been waited for
BProcess: do not allow sending signals to a process from the handler when it has already terminated and been waited for


SeReRPRo/badvpn,SeReRPRo/badvpn,SeReRPRo/badvpn,SeReRPRo/badvpn,SeReRPRo/badvpn