Werk #3633: check_sql: minor cleanup in active check_sql, fixed performance data handling

Component	Checks & agents
Title	check_sql: minor cleanup in active check_sql, fixed performance data handling
Date	Jun 6, 2016
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.4.0i1 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

To the list of all Werks