MySQL 5.5.10 homebrew install issue

Coming after the mysql 5.1.52 homebrew install issue, the just released mysql 5.5.10, which solved the previous problem, has another issue.

When starting mysql daemon with mysql.server script, it showed error message like

ERROR! The server quit without updating PID file (/usr/local/var/mysql/data/*********.pid).

The new homebrew instruction to install mysql makes its default $datadir to be $basedir/data but the setting of $datadir in mysql.server line 70 didn't be fixed to corresponded to the change.

Adjust $datadir in script or just use boot parameter --data-dir=/usr/local/Cellar/mysql/5.5.10/data/ makes mysql.server work.