Add MotD support.

Fixed config up.
Better handling of config variables

conf/ftp.conf

@@ -3,14 +3,19 @@
 ## This is the primary configuration file. Here is where you'll find all the
 ## necessary options to configure your FTP server.
 
-## == String Formatting
+#### Cheat Sheet
+### String Variables
 ## These may be used in certain options to be runtime replaced.
+##  %a     App Name
 ##  %u     Username
-##  %p     Password
 ##  %v     Version
 ##  %h     Hostname
-
-## == Booleans
+##  %d     Date
+##  %t     Time
+## Example: %a %v: Hi %u. It is %t on %d.
+##          digFTP v1.0.0: Hi user on example.com, your password is h4ckm3.
+##
+### Booleans
 ##  true | false
 ## ----- | -----
 ##     1 |     0
@@ -18,41 +23,38 @@
 ##   yes |    no
 ## Anything unrecognized will be treated as 'false'.
 
-## CORE OPTIONS
-## These affect the very core of the server.
 [core]
 ## The name of the server it sends to the client.
 ## Syntax: server_name=<string>
-server_name=digFTP %v
+## Default: %a %v
+server_name=%a %v
 
-## MotD command to post the output to clients after log in.
-## WARNING: This method can be insecure. Use with caution.
-## Syntax: motd_command=<command>
-#motd_command=cowsay -r Welcome %u.
-
-## MotD file to post to clients after log in. Overrides `motd_command`.
-## Syntax: motd_file=<path>
-#motd_file=motd
-
-## MotD text to post to clients after log in. Overrides `motd_command` and
-## `motd_file`.
-## Syntax: motd_text=<string>
-#motd_text=
+## Message of the Day to post to clients upon log in.
+## Syntax: motd=<string>
+##         motd=file:<path>
+##         motd=cmd:<command>
+## WARNING: Commands could be dangerous. Use with caution.
+#motd=cmd:cowsay -r Welcome %u.
+#motd=file:ftp.motd
+#motd=Welcome.
 
 ## Path to digFTP plugins
 ## Syntax: plugin_path=<path>
+## Default: /usr/lib/digftp/plugins
 plugin_path=/usr/lib/digftp/plugins
 
-## Authentication Engine to use for logging in.
-## Syntax: auth_engine=<name>
+[engines]
+## These specify the interface to use for functions.
+## Engines are provided through plugins.
+## Syntax: <interface>=<plugin name>
 
-auth_engine=local
-
-## Filer engine to use for the clients file system.
-## Syntax: file_engine=<name>
-## Possible values are: local
-filer_engine=local
+## Engine used for authenticating users.
+## Default: pam
+auth=pam
 
+## Engine used for handling the filesystem.
+## Default: local
+filer=local
 
 [net]
 ## Network address and port to listen on.
@@ -60,6 +62,8 @@ filer_engine=local
 listen=127.0.0.1:21
 
 ## Whether to support SSL. Server must be compiled with WITH_SSL=ON.
+## This is highly recommended as it allows clients to secure their login 
+## credentials. SSL support is provided as explicit (AUTH command).
 ## Syntax: ssl=<bool>
 ssl=on
 
@@ -67,9 +71,13 @@ ssl=on
 utf8=off
 
 [ssl]
+## Configuration for FTPS (Explicit SSL)
+
 certificate=cert.pem
 private_key=key.pem
 
+## Ciphers to use for SSL.
+## Default: ALL:!ADH:!LOW:!EXP:!MD5:@STRENGTH
 ciphers=ALL:!ADH:!LOW:!EXP:!MD5:@STRENGTH
 
 ssl_v2=no
@@ -81,9 +89,10 @@ tls_v1_3=yes
 compression=yes
 prefer_server_ciphers=yes
 
+#### LOGGING
+## Filenames for loglevels.
 [logging]
-## Log messages to file. Logging has multiple options pertaining to each 
-## loglevel. All values are paths.
+## Log server output files.
 ## Syntax: [console|critical|error|warning|info|debug|all]=<path>
 info=digftp.info.log
 error=digftp.error.log
@@ -96,4 +105,7 @@ file=passdb
 
 ## Root of logged in user. Can use string formatting.
 ## Syntax: home_path=<path>
-home_path=/home/%u/
+home_path=/home/%u/
+
+[pam]
+chroot=yes

conf/ftp.motd

@@ -0,0 +1 @@
+Welcome %u!

conf/motd

@@ -1 +0,0 @@
-Welcome to my FTP server.