网站升级到drupal 4.3.1

Fixes and changes in 4.3.1:
Fixed broken link in forum module.
Fixed broken usernames in 'Who's new' block.
Fixed error messages not being shown.
Fixed incorrect link title in watchdog module.
Fixed invalid XHTML in poll.module.
Fixed leftover debug statement in story module.
Fixed menu glitch in book module.
Fixed non-ANSI SQL query in path module.
Fixed typo in cloud module.
Fixed bug #2617: editing user information does not work.
Fixed bug #3900: PostgreSQL problem with locale module.
Fixed bug #4055: Added missing break statements.
Fixed bug #4080: comments shown against wrong node.
Fixed bug #4323: Renamed 'Content-length' to 'Content-Length.
Translation fix: made the word 'permission' translatable in the system module' help text.
Translation fix: the date in the calendar block could not be translated.
Translation fix: the ping module's help text was translated twice.