Check_MK Werk 5648: omd stop/start: Add new option to execute site actions simultaneously

ID: 5648 Title: omd stop/start: Add new option to execute site actions simultaneously Component: Site Management Level: 1 Class: Bug fix Version: 1.5.0i3 When having a larger number of sites an "omd start" or "omd stop" operation may take a lot of time since all processes are handles sequentially. To improve the overall execution time we have now added the optional -p/--parallel arguments to handle the site actions simultaneously. This change has mainly been made to fix long running overall startup / stop times caused when having a lot of sites on a single system. This can be a problem especially in clustered environments.