With previous versions of mirror when it timestamped the local file
with the time of the remote file it converted it to GMT.  This meant
that when you did an 'ls -l' on the file it would be a different time
to that on the originating site.

This version of mirror corrects that.  BUT it means that all your
existing timestamps are invalid.  To correct this for each package
you need to do:
	mirror -kuse_timelocal=0 package
		to make sure the package is up to date

	mirror -T package
		to force correction of all timestamps

If you fail to do this mirror is likely to decide that all your files are
out of date and re-pull the lot!

If, like me, your site has a 0 offset from GMT then you don't have to do
anything.