rpcapd-config(5): Document ActiveClient and PassiveClient better.

For ActiveClient reword the description for clarity.  For PassiveClient
remove all mentions of port numbers to match what fileconf_read()
implements, which in turn matches the behaviour implemented and
documented for the -l command-line flag, which in turn is the most
sensible behaviour because the source TCP port is almost certainly
ephemeral.

Author: infrastation

rpcapd/rpcapd-config.manfile.in

@@ -17,7 +17,7 @@
 .\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
 .\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 .\"
-.TH RPCAPD-CONFIG @MAN_FILE_FORMATS@ "6 January 2019"
+.TH RPCAPD-CONFIG @MAN_FILE_FORMATS@ "18 October 2025"
 .SH NAME
 rpcapd-config \- rpcapd configuration file format
 .SH DESCRIPTION
@@ -47,22 +47,20 @@ are:
 .B ActiveClient
 .I value
 is a host name or IP address, followed by a comma,
-semicolon, or space, followed by a port name and address or
-.BR DEFAULT .
-.B DEFAULT
-specifies the default active mode port for rpcapd, port 2003.
+semicolon, or space, followed by either a port number or a service name
+recognized by
+.BR getaddrinfo (3)
+or the word
+.B \%DEFAULT
+to mean port number 2003.
 Each
 .B ActiveClient
 line adds the host and port to the list of clients to which the server
 should connect in active mode.
 .TP
 .B PassiveClient
 .I value
-is a host name or IP address, followed by a comma,
-semicolon, or space, followed by a port name and address or
-.BR DEFAULT .
-.B DEFAULT
-specifies the default passive mode port for rpcapd, port 2002.
+is a host name or IP address.
 Each
 .B PassiveClient
 line adds the host and port to the list of clients addresses and ports