[PATCH] Take DST into account

Right now, mercurial doesn't take daylight saving time into account
because it uses time.timezone inconditionally, instead of resorting to
time.altzone if daylight saving time is on.

mercurial/hg.py

@@ -280,7 +280,12 b' class changelog(revlog):'
 
     def add(self, manifest, list, desc, transaction, p1=None, p2=None,
                   user=None, date=None):
-        date = date or "%d %d" % (time.time(), time.timezone)
+        if date:
+            date = util.date_parser(date)
+        else:
+            if time.daylight: offset = time.altzone
+            else: offset = time.timezone
+            date = "%d %d" % (time.time(), offset)
         list.sort()
         l = [hex(manifest), user, date] + list + ["", desc]
         text = "\n".join(l)