DO uses Google nameservers by default. This causes RBL queries to fail.
Can be tested with the following command:
$ host 2.0.0.127.zen.spamhaus.org
Host 2.0.0.127.zen.spamhaus.org not found: 3(NXDOMAIN)
With unbound we get:
$ host 2.0.0.127.zen.spamhaus.org
2.0.0.127.zen.spamhaus.org has address 127.0.0.2
2.0.0.127.zen.spamhaus.org has address 127.0.0.10
2.0.0.127.zen.spamhaus.org has address 127.0.0.4
Also, we do not use dnsmasq because it is not a recursive resolver. It will
always forward and this defaults to the value in /etc/network/interfaces
(which is Google DNS on DO!).
Note that we cannot simply ignore EPIPE in the node programs.
Doing so results in no logs anymore :-( This is supposedly
fixed in systemd 228.
Fixes#550
On Unix, child processes are not killed when parent dies.
Each process is part of a process group (pgid). When pgid == pid,
it is the process group leader.
node creates child processes with the parent as the group leader
(detached = false).
You can send a signal to entire group using kill(-pgid), as in,
negative value in argument. Systemd can be made to do this by
setting the KillMode=control-group.
Unrelated: Process groups reside inside session groups. Each session
group has a controlling terminal. Only one process in the session
group has access to the terminal. Process group is basically like
a bash pipeline. A session group is the entire login session with only
one process having terminal access at a time.
Fixes#543
