ping: The -C option is also supported for IPv6.

MFC after:	3 days
Sponsored by:	Klara, Inc.
Sponsored by:	NetApp, Inc.
Reviewed by:	rscheff, allanjude
Differential Revision:	https://reviews.freebsd.org/D41881

sbin/ping/main.c

@@ -211,7 +211,7 @@ usage(void)
 	    "Z"
 #endif
 	    "] "
-	    "[-b bufsiz] [-c count] [-e gateway]\n"
+	    "[-b bufsiz] [-C pcp] [-c count] [-e gateway]\n"
 	    "\t    [-I interface] [-i wait] [-k addrtype] [-l preload] "
 	    "[-m hoplimit]\n"
 	    "\t    [-p pattern]"

sbin/ping/ping.8

@@ -27,7 +27,7 @@
 .\"
 .\"     @(#)ping.8	8.2 (Berkeley) 12/11/93
 .\"
-.Dd November 20, 2022
+.Dd September 15, 2023
 .Dt PING 8
 .Os
 .Sh NAME
@@ -81,6 +81,7 @@ packets to network hosts
 .Op Fl 6AaDdEfHNnOoquvYyZ
 .Op Fl .\& Ns Ar chars
 .Op Fl b Ar bufsiz
+.Op Fl C Ar pcp
 .Op Fl c Ar count
 .Op Fl e Ar gateway
 .Op Fl I Ar interface