ioutil is deprecated in Go 1.16 and SFTPGo is an application, not
a library, we have no reason to keep compatibility with old Go
versions.
Go 1.16 fix some cifs related issues too.
- add JWT authentication
- admins are now stored inside the data provider
- admin access can be restricted based on the source IP: both proxy
header and connection IP are checked
- deprecate REST API CLI: it is not relevant anymore
Some other changes to the REST API can still happen before releasing
SFTPGo 2.0.0
Fixes#197