Check_MK Werk 0633: diskstat: fixed performance data of old legacy disk IO read/write data

ID: 0633 Title: diskstat: fixed performance data of old legacy disk IO read/write data Component: Core & Setup Level: 1 Class: Bug Fix Version: 1.2.5i5 When diskstat is configured to have seperate checks for read and write IO, counter values instead of rates were taken as performance data. This is fixed now.