# ...
 <IfModule worker.c>
 StartServers        {{ printf "%s/%s/apache/startservers" $myenv $myapp | key }}
 MaxClients          {{ printf "%s/%s/apache/MaxClients" $myenv $myapp | key }}
 MinSpareThreads     {{ keyOrDefault (printf "%s/%s/apache/MinSpareThreads" $myenv $myapp ) "25" }}
 MaxSpareThreads     {{ keyOrDefault (printf "%s/%s/apache/MaxSpareThreads" $myenv $myapp ) "75" }}
 ThreadsPerChild     {{ keyOrDefault (printf "%s/%s/apache/ThreadsPerChild" $myenv $myapp ) "25" }}
 MaxRequestsPerChild {{ keyOrDefault (printf "%s/%s/apache/MaxRequestsPerChild" $myenv $myapp ) "0" }}
 </IfModule>