We now use a regular release zip, and use it in the awseb bundle.
The default logback configuration now logs to a file, like
`eclair-node`, and we use a dedicated logback configuration for AWS
beanstalk.
By default the front reads the node secret key from the node seed in
the standard `.eclair` directory.
When we have a trusted relationship with some of our peers (business
relations, family members, our own mobile wallet, etc) it makes sense to
relax the feerate mismatch constraint.
This must be done per-node, to avoid leaving the gates open for attackers.
