Some versions of killall do support the `killall -SIGNAL` syntax and
have only `-s SIGNAL` which should be supported everywhere.

I see the problem with *killall (PSmisc) 23.3* on latest TurrisOS 5.2

Signed-off-by: Jan Baier <jan.baier@amagical.net>

If bmx7 isn't running just yet the folder
`/var/run/bmx7/json/originators` is missing and so the while loop runs
non stop. Now the loop sleeps for 10 seconds if inotifywait fails.

Signed-off-by: Paul Spooren <spooren@informatik.uni-leipzig.de>

Makes it easy to address bmx7 shorids and hostnames with ping, ssh, etc.
Both are stored in /tmp/hosts/ and so loaded by dnsmasq.
Instead of using a cron job which triggers the bmx7 deamon every so and
so, inotifywait is used to see creation or deletion of originators in
/var/run/bmx7/json/originators/

Signed-off-by: Paul Spooren <spooren@informatik.uni-leipzig.de>