Revert "update Changelog for refs #3810"

This reverts commit 1f16e1eb138cf2e680a568b09cbd7843646c4b55.
Revert "idoutils: add executed command from core host/service status"

This reverts commit 4945c543ff225abd05248c9374bbf555ca748165.
Revert "WIP: executed command on checks"

This reverts commit c3f564fa6777969db53e266f356d3c1d2a141659.

reverting for security relevance on the checkresult files on disk. if
processed in memory, it would be a better chance.
increase performance with hash comparing hosts/services to show/filter

refs #3722
fix ownership of log file before dropping privs, don't segfault on permission problem with log file

refs #3521