docs: public static ProcessReturn sendEmail_Unix (String target, String topic, String text) throws OSHelperException {
  		topic = topic.replaceAll ("\"", "\\\"");
  		String emailCommandAsString = "mail -s \"" + topic + "\" -S sendcharsets=utf-8 " + target;
  		List<String> emailCommandAsList = OSHelper.constructCommandAsList_Unix_sh (emailCommandAsString);
  		Process process = OSHelper.runCommand (emailCommandAsList);
  		OutputStream processStdin = process.getOutputStream ();
  		try {
  			processStdin.write (text.getBytes ());
  		} catch (IOException ex) {
  			throw new OSHelperException (ex);
  		}
  		try {
  			processStdin.close ();
  		} catch (IOException ex) {
  			throw new OSHelperException (ex);
  		}
  		ProcessReturn processReturn = OSHelper.procWaitWithProcessReturn (process, 10000);
  		return processReturn;
  	}