RELEASE: v1.7.17

[Warren Young]

This is a necessary release for those who downloaded 1.7.16 and are 
using it on Linux (or probably any Unixy platform) or want to use 
MySQL++ with beta and alpha versions of MySQL.

     o Reverted one of the VC++ warning fix changes from 1.7.16 that
       caused crashes on Linux.

     o Added a configure test that conditionally adds the extra 'level'
       parameter to mysql_shutdown() that was added in MySQL 4.1.3 and
       5.0.1.

As always, it is available at http://tangentsoft.net/mysql++/