enable MySQL client side for UTF8

BUG:

Drupal doesn't work seamlessly with MySQL UTF8 charset. In addition to set default-character-set = utf8 in MySQL configure file my.ini, and create all tables with utf8, the client connection has to be established using utf8 as well. Otherwise you will get funky characters.
I don't suggest to setup default client connect as UTF8 on mysql server side for all clients, coz people may have some other clients using other charset. Instead,

FIX:

After establish mysql connect, immediately issue the command:
mysql_query('SET NAMES utf8');

For example, with 4.6.2, in the file: includes/database.mysql.inc, line 33, add mysql_query('SET NAMES utf8'); after the mysql_connect() and before return.

It has been tested and works fine on MySQL server that also has other client databases using other charset like GBK, BIG5 instead of UTF8.

Hongyi Gao