aux/listen: removing service script sholud kill listener (thanks mischief)

mischief spotted that the only way for listeners to go away was
truncating (but not removing) a service script. this is wrong and
not as described in the manpage.

this change makes removing (or truncating) a listen script stop
the listener.

scandir() first marks all current announces, then reads the service
directory adding announces which will clear the marks for the ones
already there or add a new unmarked one. finally, we shoot down and
remove all still marked announces.

0 files changed, 0 insertions, 0 deletions