Request to add helper method to DailyRollingFileAppender to generate schedule file name.  That way, subclasses can determine the names of the files that the appender will archive to.  i.e.,

Change Log4j v1.2.15 from

	void rollOver() throws IOException {
		...
		String datedFilename = fileName+sdf.format(now);
		...
	}

to

	void rollOver() throws IOException {
		...
		String datedFilename = getScheduledFileName(now);
		...
	}

	/**
	 * Subclasses may override this to change the name
	 * of file that logs get rotated to.
	 *
	 * @param date	[in] (non-null) time used to tag logs being rotated out
	 *
	 * @return name of file [to rotate to]
	 */
	protected String getScheduledFileName(Date date) {
		return fileName + sdf.format(now);
	}