[patch] More SimpleTimeZone fixes/8321

[Bryce McKinlay]

Hi Jerry,

Sorry for the slow review. This patch looks good to me, please go ahead 
and check it in.

Thanks!

Bryce

Jerry Quinn wrote:

>After doing a bunch of work to make getOffset work correctly with the various
>combinations of positive and negative values, I looked more carefully at the
>docs, and tried against the Sun jvm.  Apparently, day and day of month have to
>be positive and refer to the same day, which is different from the whay rules
>are specified.
>
>So given that, I fixed up the matching mauve test, and this patch fixes up
>major issues.  It also bumps the serial version and initializes the time mode
>variables.
>
>There is still the issue that if weekday on or before/after mode refers to a
>day outside the nominal month, getOffset won't work right.  PR 15560.
>
>
>2004-05-21  Jerry Quinn  <jlquinn@optonline.net>
>
>	PR libgcj/8321
>	* java/util/SimpleTimeZone.java (serialVersionOnStream): Bump to 2.
>	(setStartRule,setEndRule): Don't take abs of day number.
>	(getOffset): Clarify docs.  Add argument checks.
>	(isBefore): Take abs of day number in DOW_LE_DOM_MODE.
>	(equals,hasSameRules,toString,readObject): Use startTimeMode and
>	endTimeMode.
>	* testsuite/libjava.mauve/xfails
>	(gnu.testlet.java.util.SimpleTimeZone.check12): XFAIL test 22.
>  
>