This change is required to be able to set multiple domains for the same
certificate using env vars.
The change is backward compatible for general use cases but may be
backward incompatible in some edge cases, for example:
- "sftpgo.com,www.sftpgo.com" will work as before
- "sftpgo.com, www.sftpgo.com" will not work anymore
Check the logs to see if you are affected and rename the certificate and key
to fix
Signed-off-by: Nicola Murino <nicola.murino@gmail.com>