update default ftp config file

conf/ftp.conf

@@ -93,10 +93,15 @@ prefer_server_ciphers=yes
 ## Filenames for loglevels.
 [logging]
 ## Log server output files.
-## Syntax: [console|critical|error|warning|info|debug|all]=<path>
-info=digftp.info.log
-error=digftp.error.log
-debug=digftp.debug.log
+## Syntax: [critical|error|warning|info|debug|all]=<path>
+info=digftp.log
+warning=digftp.log
+error=digftp.log
+critical=digftp.log
+
+## Output loglevel to console
+## Syntax: console=[critical|error|warning|info|debug|all|none]
+console=all
 
 [passdb]
 ## The file for the passdb engine.