diff --git a/doc/rrdlastupdate.1 b/doc/rrdlastupdate.1
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--- a/doc/rrdlastupdate.1
+++ b/doc/rrdlastupdate.1
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.IX Title "RRDLASTUPDATE 1"
-.TH RRDLASTUPDATE 1 "2008-03-15" "1.3.0" "rrdtool"
+.TH RRDLASTUPDATE 1 "2008-09-25" "1.3.99909060808" "rrdtool"
.SH "NAME"
rrdlastupdate \- Return the most recent update to an RRD
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
\&\fBrrdtool\fR \fBlastupdate\fR \fIfilename\fR
+[\fB\-\-daemon\fR\ \fIaddress\fR]
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The \fBlastupdate\fR function returns the \s-1UNIX\s0 timestamp and the
.IP "\fIfilename\fR" 8
.IX Item "filename"
The name of the \fB\s-1RRD\s0\fR that contains the data.
+.IP "\fB\-\-daemon\fR \fIaddress\fR" 8
+.IX Item "--daemon address"
+Address of the rrdcached daemon. If specified, a \f(CW\*(C`flush\*(C'\fR command is sent
+to the server before reading the \s-1RRD\s0 files. This allows \fBrrdtool\fR to return
+fresh data even if the daemon is configured to cache values for a long time.
+For a list of accepted formats, see the \fB\-l\fR option in the rrdcached manual.
+.Sp
+.Vb 1
+\& rrdtool lastupdate \-\-daemon unix:/var/run/rrdcached.sock /var/lib/rrd/foo.rrd
+.Ve
+.SH "ENVIRONMENT VARIABLES"
+.IX Header "ENVIRONMENT VARIABLES"
+The following environment variables may be used to change the behavior of
+\&\f(CW\*(C`rrdtool\ lastupdate\*(C'\fR:
+.IP "\fB\s-1RRDCACHED_ADDRESS\s0\fR" 4
+.IX Item "RRDCACHED_ADDRESS"
+If this environment variable is set it will have the same effect as specifying
+the \f(CW\*(C`\-\-daemon\*(C'\fR option on the command line. If both are present, the command
+line argument takes precedence.
.SH "AUTHOR"
.IX Header "AUTHOR"
Andy Riebs <andy.riebs@hp.com>