Method simpleCommand

app/src/main/java/com/sun/mail/pop3/Protocol.java:1158–1164

Issue a simple POP3 command and return the response.

(String cmd)

     * Issue a simple POP3 command and return the response.
     */
    private Response simpleCommand(String cmd) throws IOException {
	simpleCommandStart(cmd);
	issueCommand(cmd);
	Response r = readResponse();
	simpleCommandEnd();
	return r;
    }

	/**
	 * Issue a two line POP3 command and return the response