.IP
If \fBstopword\fR is used without arguments then the list of stopwords is
cleared.
+.IP
+There is a default set of stopwords built in, but this option can be used to
+augment or replace that list.
.TP
.B tracklength \fIPATTERN\fR \fIMODULE\fR
Specifies the module used to calculate the length of files matching
\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