[PATCH] rtc: small documentation update

Programming and/or enabling interrupt frequencies greater than 64Hz is

only allowed by root. This is perhaps a bit conservative, but we don't want

an evil user generating lots of IRQs on a slow 386sx-16, where it might have

a negative impact on performance.  Note that the interrupt handler is only

a few lines of code to minimize any possibility of this effect.

a negative impact on performance. This 64Hz limit can be changed by writing

a different value to /proc/sys/dev/rtc/max-user-freq. Note that the

interrupt handler is only a few lines of code to minimize any possibility

of this effect.

Also, if the kernel time is synchronized with an external source, the 

kernel will write the time back to the CMOS clock every 11 minutes. In 

 */

#include <stdio.h>

#include <stdlib.h>

#include <linux/rtc.h>

#include <sys/ioctl.h>

#include <sys/time.h>