Migration: Print error message on non-existing icinga.cfg.
Implement HOSTDURATIONSEC and SERVICEDURATIONSEC macros.
Build fix.
Implement TOTALHOSTSERVICES, TOTALHOSTSERVICESOK, TOTALHOSTSERVICESWARNING, TOTALHOSTSERVICESUNKNOWN and TOTALHOSTSERVICESCRITICAL macros.
Set thread names for the BufferedStream thread procs.