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+This is a PostgreSQL adapted version of the timezone library
+from:
+ftp://elsie.nci.nih.gov/pub/tz*.tar.gz
+
+
+The interface is used when USE_PGTZ is defined at the top level. This
+will cause the following functions to be redefined:
+ localtime pg_localtime
+ gmtime pg_gmtime
+ asctime pg_asctime
+ ctime pg_ctime
+ difftime pg_difftime
+ mktime pg_mktime
+ tzset pg_tzset
+
+and the TIMEZONE_GLOBAL define in c.h is redefined to pg_timezone.
+