Add ability to read from options file to check_mysql_query.c

This is the same code that was added to check_mysql.c in 5ed7194.
Add additional usage data for new options in check_mysql_query.c
Clarify check_mysql test prompts

Also default to "-u test -ptest" which are default MySQL accounts only
missing the prescribed privileges.

The database is no longer specified as it is not used.
If wanted is should be its own parameter/tests.
Typo
Just fixing small typo in comment
check_mailq: adding nullmailer support

Adding nullmailer support to check_mailq submitted by Luca Corti

Closes: #740
Closes: #1189
updated NEWS