Patch for the MUST time zone (Mauritius Summer Time)

Hi,

This trivial patch allows PostgreSQL to understand the MUST (Mauritius Summer 
Time) time zone that is in used since 2008-11.

Before the patch :
# SELECT '2009-03-15 14:54:15 MUST'::timestamp;
ERROR:  invalid input syntax for type timestamp: "2009-03-15 14:54:15 MUST"

After the patch :
# SELECT '2009-03-15 14:54:15 MUST'::timestamp;     timestamp
---------------------2009-03-15 14:54:15
(1 row)


Index: src/timezone/tznames/Default
===================================================================
RCS file: /projects/cvsroot/pgsql/src/timezone/tznames/Default,v
retrieving revision 1.6
diff -c -r1.6 Default
*** src/timezone/tznames/Default        1 May 2008 20:05:08 -0000       1.6
--- src/timezone/tznames/Default        5 Mar 2009 07:03:19 -0000
***************
*** 640,645 ****
--- 640,647 ----                  #     (Indian/Chagos) MUT     14400    # Mauritius Island Time                  #
(Indian/Mauritius)
+ MUT     18000 D  # Mauritius Island Summer Time
+                  #     (Indian/Mauritius) MVT     18000    # Maldives Island Time                  #
(Indian/Maldives)RET     14400    # Reunion Time
 

Index: src/timezone/tznames/Indian.txt
===================================================================
RCS file: /projects/cvsroot/pgsql/src/timezone/tznames/Indian.txt,v
retrieving revision 1.2
diff -c -r1.2 Indian.txt
*** src/timezone/tznames/Indian.txt     25 Jul 2006 13:49:21 -0000      1.2
--- src/timezone/tznames/Indian.txt     5 Mar 2009 07:05:35 -0000
***************
*** 27,32 ****
--- 27,34 ----                  #     (Indian/Chagos) MUT     14400    # Mauritius Island Time                  #
(Indian/Mauritius)
+ MUT     18000 D  # Mauritius Island Summer Time
+                  #     (Indian/Mauritius) MVT     18000    # Maldives Island Time                  #
(Indian/Maldives)RET     14400    # Reunion Time