icmp.7: Add kernel version numbers to /proc file descriptions

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

man7/icmp.7

@@ -4,7 +4,7 @@
 .\" and in case of nontrivial modification author and date
 .\" of the modification is added to the header.
 .\" $Id: icmp.7,v 1.6 2000/08/14 08:03:45 ak Exp $
-.TH ICMP 7 2008-11-20 "Linux" "Linux Programmer's Manual"
+.TH ICMP 7 2008-11-24 "Linux" "Linux Programmer's Manual"
 .SH NAME
 icmp, IPPROTO_ICMP \- Linux IPv4 ICMP kernel module.
 .SH DESCRIPTION
@@ -47,7 +47,8 @@ cleared after a burst.
 A jiffy is a system dependent unit, usually 10ms on i386 and
 about 1ms on alpha and ia64.
 .TP
-.I icmp_destunreach_rate
+.IR icmp_destunreach_rate " (Linux 2.2 to 2.4.10)"
+.\" Precisely: from 2.1.102
 Maximum rate to send ICMP Destination Unreachable packets.
 This limits the rate at which packets are sent to any individual
 route or destination.
@@ -55,30 +56,34 @@ The limit does not affect sending of
 .B ICMP_FRAG_NEEDED
 packets needed for path MTU discovery.
 .TP
-.I icmp_echo_ignore_all
+.IR icmp_echo_ignore_all " (since Linux 2.2)"
+.\" Precisely: 2.1.68
 If this value is non-zero, Linux will ignore all
 .B ICMP_ECHO
 requests.
 .TP
-.I icmp_echo_ignore_broadcasts
+.IR icmp_echo_ignore_broadcasts " (since Linux 2.2)"
+.\" Precisely: from 2.1.68
 If this value is non-zero, Linux will ignore all
 .B ICMP_ECHO
 packets sent to broadcast addresses.
 .TP
-.I icmp_echoreply_rate
+.IR icmp_echoreply_rate " (Linux 2.2 to 2.4.10)"
+.\" Precisely: from 2.1.102
 Maximum rate for sending
 .B ICMP_ECHOREPLY
 packets in response to
 .B ICMP_ECHOREQUEST
 packets.
 .TP
-.I icmp_paramprob_rate
+.I icmp_paramprob_rate " (Linux 2.2 to 2.4.10)"
+.\" Precisely: from 2.1.102
 Maximum rate for sending
 .B ICMP_PARAMETERPROB
 packets.
 These packets are sent when a packet arrives with an invalid IP header.
 .TP
-.I icmp_timeexceed_rate
+.IR icmp_timeexceed_rate " (Linux 2.2 to 2.4.10)"
 Maximum rate for sending
 .B ICMP_TIME_EXCEEDED
 packets.