add "stop on arbitrary number of failed replies" function

[lazna]

dealing with routing issue time by time. Want to write script where pinging some host and when it stop responding (e.g. 4 pings failed), want to terminate ping and continue to next script step, download routing tables from several machines to see what is happeing there. So %subj% function will be handy, with possible specification of reply type:

something like:

powerping --noreplystop <num_of_timouted_packets_required_to_ping_terminate>
powerping --replycode <specific_icmp_code> <num_of_specified_replycodes_required_to_ping_terminate>

possibly add option to distinct 'continous serie cause ping stop' from 'total number cause ping stop' but I do not want to complicate it too much.