Fix check_mysql.c client options from file (#1199)

[Sam Kottler]

@awiddersheim sorry it took so long for this to get reviewed.

Doesn't this patch prevent `~/.my.cnf` from getting loaded if the items in
`/etc/` don't exist?

-- 
Reply to this email on GitHub:
https://github.com/monitoring-plugins/monitoring-plugins/pull/1199#issuecomment-38792355
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://www.monitoring-plugins.org/archive/devel/attachments/20140327/20dea3ae/attachment.html>