variable that have no protocol and simply start with a '/' path separator may
be used to specify mounted filesystem mirrors.
.TP
-\fBhttp_proxy ftp_proxy\fR = \fI[protocol://host:port]\fR
-These vars are used if the sources must be downloaded from the
-internet by \fBwget\fR(1). They are only required if you use a
+\fBhttp_proxy ftp_proxy RSYNC_PROXY\fR = \fI[protocol://host:port]\fR
+These variables are used by network clients such as \fBwget\fR(1) and
+\fBrsync\fR(1). They are only required if you use a
proxy server for internet access.
.TP
\fBINSTALL_MASK\fR = \fI[space delimited list of file names]\fR