Fix identify_system_timezone() so that it tests the behavior of the system
authorTom Lane <tgl@sss.pgh.pa.us>
Tue, 1 Jul 2008 03:41:01 +0000 (03:41 +0000)
committerTom Lane <tgl@sss.pgh.pa.us>
Tue, 1 Jul 2008 03:41:01 +0000 (03:41 +0000)
commit74f442ca522c44b691dcb9e5a3c85c6d36bb689c
tree3015bf8767416c1b0a073fabd6f715abe7b3b680
parentb6fde18c8467c964a4fc415a4a3bea89beb61741
Fix identify_system_timezone() so that it tests the behavior of the system
timezone setting in the current year and for 100 years back, rather than
always examining years 1904-2004.  The original coding would have problems
distinguishing zones whose behavior diverged only after 2004; which is a
situation we will surely face sometime, if it's not out there already.

In passing, also prevent selection of the dummy "Factory" timezone, even
if that's exactly what the system is using.  Reporting time as GMT seems
better than that.
src/timezone/pgtz.c