than one network can be specified as defaults.
First cut at improved launch/tear-down so iptables entries do not get
duplicated, especially if the zerotier daemon quits because networking
has not come up properly after a reboot.
Signed-off-by: Phill Kelley <34226495+Paraphraser@users.noreply.github.com>
1. Rename files with "bridge" in the name to "router".
2. Edit file contents referring to "bridge" so they refer to "router".
3. Update README to reflect this change, plus point to the relevant
link in the ZeroTier documentation.
Signed-off-by: Phill Kelley <34226495+Paraphraser@users.noreply.github.com>
