to connect until it succeeds

the T tracer (separate compilation for the moment)

probably not be here.

it probably makes things zillion times slower but it seems to be necessary

and it won't work anyway, it will mess up with the T

better in case of slow link between local and remote tracers
may smoke lots of memory though

to be redone (the local tracer shall not configure the tracee by
itself but only forward what the remote tracer sends)

- add global ON/OFF command line options (OFF is useless but just for
  completeness)

yes you need this xflush before sleeping into select...

- array of plots
- deal with colors

- update X events management
- lock to protect data while plotting (may become a problem in the future)
- better naming of dimensions

this commit should be cut in small pieces
bah

- minor fix

- add on/off command line options