Check_MK Werk 0398: Tolerate debug output in check plugins when using CMC

ID: 0398 Title: Tolerate debug output in check plugins when using CMC Component: Core & Setup Level: 1 Class: Bug Fix Version: 1.2.5i1 When using the Check_MK Micro Core and at the same time check plugins output debug information to stdout, the communication with the core was garbled up and the check helper died with an exception. This fix eliminates any unauthorized output to stdout be removing the filedescriptor to a save place and replacing stdout with <tt>/dev/null</tt>.