[NET]: add RFC references for Linux SNMP MIBs.

include/net/snmp.h

@@ -42,6 +42,11 @@
  */ 
 
  
+/*
+ * RFC 1213:  MIB-II
+ * RFC 2011 (updates 1213):  SNMPv2-MIB-IP
+ * RFC 2863:  Interfaces Group MIB
+ */
 struct ip_mib
 {
  	unsigned long	IpInReceives;
@@ -64,6 +69,9 @@ struct ip_mib
 	unsigned long   __pad[0]; 
 };
  
+/*
+ * RFC 2465:  IPv6 MIB: General Group
+ */
 struct ipv6_mib
 {
 	unsigned long	Ip6InReceives;
@@ -91,6 +99,10 @@ struct ipv6_mib
 	unsigned long   __pad[0]; 
 };
  
+/*
+ * RFC 1213:  MIB-II ICMP Group
+ * RFC 2011 (updates 1213):  SNMPv2 MIB for IP: ICMP group
+ */
 struct icmp_mib
 {
  	unsigned long	IcmpInMsgs;
@@ -123,6 +135,9 @@ struct icmp_mib
 	unsigned long   __pad[0]; 
 };
 
+/*
+ * RFC 2466:  ICMPv6-MIB
+ */
 struct icmpv6_mib
 {
 	unsigned long	Icmp6InMsgs;
@@ -161,6 +176,10 @@ struct icmpv6_mib
 	unsigned long   __pad[0]; 
 };
  
+/*
+ * RFC 1213:  MIB-II TCP group
+ * RFC 2012 (updates 1213):  SNMPv2-MIB-TCP
+ */
 struct tcp_mib
 {
  	unsigned long	TcpRtoAlgorithm;
@@ -180,6 +199,10 @@ struct tcp_mib
 	unsigned long   __pad[0]; 
 };
  
+/*
+ * RFC 1213:  MIB-II UDP group
+ * RFC 2013 (updates 1213):  SNMPv2-MIB-UDP
+ */
 struct udp_mib
 {
  	unsigned long	UdpInDatagrams;