+* -tlsbind/-pem: enable TLS, specify address to listen on and path
+ to PEM file with certificate and private key
+* -passwords: enable client authentication and specify path to
+ passwords file
+* -verbose: increase log messages verbosity
+
+TLS
+
+If you specify -bind and -tlsbind simultaneously, then you will have
+both raw and encrypted listening sockets. You can use -bind "" to
+disable raw socket.
+
+AUTHENTICATION
+
+You can turn on optional client authentication by preparing passwords
+file and using the -passwords argument. Format of passwords file is:
+
+ login1:password1\n
+ login2:password2\n
+ …
+
+You can force rereading of passwords file without server interruption by
+sending HUP signal to him.