PDO Mysql and mysql5

The documentation on php.net/pdo_mysql only states 3.x/4.x, i was
going to add that it supports 5.0 as well, since it has been supported
since over a year now i'm thinking it should be added to the
documentation.  It is causing issues with people wondering if it is
supported or not, even if you say you've been using it for a while.

I thought I'd check to see if it was ok before i committed my change
since i couldn't find any solid evidence of 5.0 support besides the
bogus bug last year in october:
http://pecl.php.net/bugs/bug.php?id=5648

Curt.