Do not spam stdout when checking for running daemons

libexec/saturnin-iam

     # start familiar as indicated by conf file (unless running)
     #
     local f=$1
-    pids_matching $f && return 0
+    pids_matching $f >/dev/null && return 0
     local like=$(saturnin conf -p iam.starting.like.this.$f)
     debug -v f like
     if test -n  "$like";