Shutdown script (derived from "Simple startup daemon's on boot question?")

[Tomas]

Hi list,

Watching the thread about startup script I thought of a question about 
shutdown script. Is it necessary to shutdown certain services when 
machine goes down? Like for example mysql, dovecot, clamav, amavis or 
openvpn. I've never saw anybody do that. Lots of people on their 
manuals, tutorials or posts writes how to start mysql, but none of then 
writes a shutdown script. So maybe it is not so necessary? (But then 
again, mysql is a database engine, and databases should be handle with 
care).