in almost all cases below it is recommended to use the -j option to make
which was the point with uing make in the first place
so that maximum degree of parallelism can be reached

**********************************************************
Note: to get the greatest speedup from make -j you should also enable
connection reuse in your ssh setup, e.g., by having the following lines
in your .ssh/config:
host *
	ControlMaster auto
	ControlPath ~/.ssh/ssh_mux_%h_%p_%r
	ControlPersist 4h

Please note, however, that maximum concurrent per-node reuse is usually
set to something low (typically 10), and this is a problem if some node
in your topology has many links. In this case you should raise that limit
on the slivers, or limit makefile concurrency (e.g., by using make -j10).
**********************************************************

==================== usual target
make [init+all]
        shortcut for 'make init all'
make init
        create util subdirs needed by this tool
make -j all
        initialize the whole topology on all nodes
==================== inspect donfig
make showslice
        show SLICE as defined in conf.mk
make shownodes
make showhostnames
make showips
make showlinks
        show nodes and links declared in conf.mk in various formats
make sshchecks
make ovsversions
        try out ssh connectivity to slivers in the slice, or show installed ovs version
make sshs SSH-COMMAND="bla bla bla"
	run "bla bla bla" in all slivers (and under sudo)
==================== For changing the topology on the fly
make L/<id1>-<id2>
	create a link between nodes with ids <id1> and <id2>
make U/<id1>-<id2>
	delete link between nodes with ids <id1> and <id2>
==================== cleanup
make shutdown
	tear down everything on the slivers, stops daemons and all
make clean
	clean up whatever has been created on the slivers, keeps daemons running
make distclean
	clean up local cache, useful when restarting from a clean slice
==================== configure (direct switches towards) OF controllers 
make showcontrollers
	show how OF controllers are configured from conf.mk
	use CONTROLLER_<nodeid> if set, or CONTROLLER as a default otherwise
	e.g. CONTROLLER=tcp:112.34.23.56:6633

make controllers
	configure the various switches so they use the configured controllers
make del-controllers
	reset the switches to run in standalone mode
==================== devel
make update 
	push a new version of sliver-ovs into the slivers
	use SLIVER_OVS that should point to the local new version
==================== manually/progressively deploy stuff (done in make all)
make dbs
        initialize ovs db in all slivers
make switchs
        start ovs switch in all slivers
make bridges
        create a bridge interface linked to tap device in each sliver
make start 
        shortcut for make dbs switchs
make stop
        stop all ovs switch in all slivers
make status
        list status of db and switch processes in all slivers
====================
make gprobes
	Uses GMAP_SERVER and GMAP_PROBES to run probes in selected slivers
	that can update a googlemap server for animating link speeds
	This of course is mostly a demo thing, based on a one-host ndnmap deployment for now
====================