More consolidation of timezone code:

* dropped DaylightSavingTime from real_time_clock code in kernel, it was
  never really being used for what it meant (and just being referred to by
  gettimeofday(), which put a different meaning to it
* adjusted the syscalls get_timezone() & set_timezone() as well as their callers 
  accordingly
* got rid of get_rtc_info() and rtc_info struct in kernel, as it was only
  being referred to by the FAT add-on and that one (like gettimeofday()) put a
  different meaning to tz_minuteswest. Added a comment to FAT's util.c
  showing a possible solution, should the hardcoded GMT timezone pose a problem.
* fixed declaration of gettimeofday() to match POSIX base specs, issue 7
* changed implementation of gettimeofday() to not bother trying to fill struct
  timezone - it was using wrong values before, anyway.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37888 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/posix/sys/time.h

@@ -1,6 +1,6 @@
 #ifndef _SYS_TIME_H
 #define _SYS_TIME_H
-/* 
+/*
 ** Distributed under the terms of the OpenBeOS License.
 */
 
@@ -40,7 +40,7 @@ extern "C" {
 
 extern int	getitimer(int which, struct itimerval *value);
 extern int	setitimer(int which, const struct itimerval *value, struct itimerval *oldValue);
-extern int	gettimeofday(struct timeval *tv, struct timezone *tz);
+extern int	gettimeofday(struct timeval *tv, void *tz);
 
 extern int	utimes(const char *name, const struct timeval times[2]);
 	/* legacy */