&EXT_RESTART logic reversal

[Axel]

hi all!

when playing around with the &EXT_RESTART section over the last
weeks, i was wondering if it would not be more user-friendly to change
the default to not restart anything and then only restart those
properties
that are set to .true. explicitely in addition to a RESTART_ALL flag.

as it is now, one can get easily confused about what is being
restarted,
and if one only wants to restart a few sections, one has to first look
up
_all_ restartable properties (which also change over time) and set
them
all to .false.

what do you think?

cheers,
    axel.