volume setting only works on OSS systems (including ALSA, via emulation).
.TP
.B collection \fIMODULE\fR \fIENCODING\fR \fIROOT\fR
+.TP
+.B collection \fIMODULE\fR \fIROOT\fR
+.TP
+.B collection \fIROOT\fR
Define a collection of tracks.
.IP
\fIMODULE\fR defines which plugin module should be used for this
-collection. Use the supplied \fBfs\fR module for tracks that exists
-as ordinary files in the filesystem.
+collection. Use the supplied \fBfs\fR module for tracks that exist
+as ordinary files in the filesystem. If no \fIMODULE\fR is specified
+then \fBfs\fR is assumed.
+.IP
+\fIENCODING\fR defines the encoding of filenames in this collection. For
+\fBfs\fR this would be the encoding you use for filenames. Examples might be
+\fBiso-8859-1\fR or \fButf-8\fR. If no encoding is specified then the current
+locale's character encoding is used.
.IP
-\fIENCODING\fR defines the encoding of filenames in this collection.
-For \fBfs\fR this would be the encoding you use for filenames.
-Examples might be \fBiso-8859-1\fR or \fButf-8\fR.
+NB that this default depends on the locale the server runs in, which is not
+necessarily the same as that of ordinary users, depending how the system is
+configured. It's best to explicitly specify it to be certain.
.IP
\fIROOT\fR is the root in the filesystem of the filenames and is
-passed to the plugin module.
+passed to the plugin module. It must be an absolute path and should not
+end with a "/".
.TP
.B default_rights \fIRIGHTS\fR
Defines the set of rights given to new users. The argument is a
.TP
.B gap \fISECONDS\fR
Specifies the number of seconds to leave between tracks. The default
-is 2.
+is 0.
.TP
.B history \fIINTEGER\fR
Specifies the number of recently played tracks to remember (including
\fISERVICE\fR.
.SS "Web Interface Configuration"
.TP
+.B mail_sender \fIADDRESS\fR
+The email address that appears in the From: field of any mail messages sent by
+the web interface. This must be set if you have online registration enabled.
+.TP
.B refresh \fISECONDS\fR
Specifies the maximum refresh period in seconds. Default 15.
.TP
Defines the maximum number of characters to include in a \fBshort\fR name
part. Default 30.
.TP
+.B smtp_server \fIHOSTNAME\fR
+The hostname (or address) of the SMTP server to use for sending mail. The
+default is 127.0.0.1.
+.TP
.B templates \fIPATH\fR ...
Specifies the directory containing templates used by the web
interface. If a template appears in more than one template directory