-certificate used to sign the \fB\*(PN\fR own certificate (the
-certificate specified on \fB-c\fR or \fB--certificate\fR).
+certificate used to sign \fB\*(PN\fR's own certificate, that is, the
+certificate specified on \fB\-c\fR or \fB\-\-certificate\fR. If
+\fB\*(PN\fR's certificate is self-signed, then \fB\-\-certificate\fR
+and \fB\-\-peer\-ca\-cert\fR should specify the same file.