GreetingMessage property defines first message (or
greeting text) sent to the user when he connects to the
server (for FTP and FTPS protocols), or banner text sent
after user logged in (in SFTP protocol).
Setting this property will affect clients that connect,
so that this message is *somehow* shown on their client
application. Different client applications handle this
message differently. Some of them show GreetingMessage as
message box, some show it as first received data from the
server - depends on the client.
Leaving GreetingMessage empty will affect wodFTPD so it
does not send greeting message at all.
NOTE: In DEMO version you cannot change