Implement smarter way to start familiar

In ini file user can now specify how the familiar should be started,
i.e. that dropbox should be started by `dropbox start`, not `dropbox`

bin/eeiam.in

     iniread -p iam.seeing.gw.$gwmac iam.ini || echo OUT
 }
 
+start_familiar() {
+    local f=$1
+    pids_matching $f && return 0
+    local like=$(iniread -p iam.starting.like.this.$f iam.ini)
+    debug -v f like
+    if test -n  "$like";
+        then
+            $like &
+        else $f &
+    fi
+}
+
 
 #
 # subcommand handlers
     local f
     for f in $(familiars_at $(where_i_am));
     do
-        pids_matching $f || $f &
+        start_familiar $f
     done
     klist || urxvt -e kinit
 }