inetd: Add missing argument to the -p flag description

While here, use the more specific "pidfile" consistently instead of
ambiguous "filename".

Reviewed by:	ziaee
MFC after:	3 days
Differential Revision:	https://reviews.freebsd.org/D57531

usr.sbin/inetd/inetd.8

@@ -25,7 +25,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd November 5, 2025
+.Dd June 10, 2026
 .Dt INETD 8
 .Os
 .Sh NAME
@@ -38,7 +38,7 @@
 .Op Fl a Ar address
 .Op Fl C Ar rate
 .Op Fl c Ar maximum
-.Op Fl p Ar filename
+.Op Fl p Ar pidfile
 .Op Fl R Ar rate
 .Op Fl s Ar maximum
 .Op Ar configuration_file
@@ -115,7 +115,7 @@ parameter.
 Turn on debugging.
 .It Fl l
 Turn on logging of successful connections.
-.It Fl p
+.It Fl p Ar pidfile
 Specify an alternate file in which to store the process ID.
 .It Fl R Ar rate
 Specify the maximum number of times a service can be invoked

usr.sbin/inetd/inetd.c

@@ -381,7 +381,7 @@ main(int argc, char **argv)
 		default:
 			syslog(LOG_ERR,
 				"usage: inetd [-dlWw] [-a address] [-C rate]"
-				" [-c maximum] [-p filename] [-R rate]"
+				" [-c maximum] [-p pidfile] [-R rate]"
 				" [-s maximum] [configuration_file]");
 			exit(EX_USAGE);
 		}