pcap-filter: indicate what named link-layer protocols are.

Add a list of protocol names for "ether proto" that gives a short
description of each protocol.

That renders a subsequent list of descrptions of some DEC protocols
below redundant; remove it.

Author: guyharris

pcap-filter.manmisc.in

@@ -627,10 +627,64 @@ True if the packet is an IPv4 multicast packet.
 True if the packet is an IPv6 multicast packet.
 .IP  "\fBether proto \fIprotocol\fR"
 True if the packet is of ether type \fIprotocol\fR.
-\fIProtocol\fP can be a number or one of the names
-\fBaarp\fP, \fBarp\fP, \fBatalk\fP, \fBdecnet\fP, \fBip\fP, \fBip6\fP,
-\fBipx\fP, \fBiso\fP, \fBlat\fP, \fBlldp\fP, \fBloopback\fP, \fBmopdl\fP, \fBmoprc\fP, \fBnetbeui\fP,
-\fBrarp\fP, \fBsca\fP, \fBslow\fP or \fBstp\fP.
+\fIProtocol\fP can be a number or one of the names:
+.RS 10
+.TP
+.B aarp
+AppleTalk ARP Protocol
+.TP
+.B arp
+ARP
+.TP
+.B atalk
+AppleTalk
+.TP
+.B decnet
+DECNet
+.TP
+.B ip
+IPv4
+.TP
+.B ip6
+IPv6
+.TP
+.B ipx
+Novell IPX
+.TP
+.B iso
+OSI protcols
+.TP
+.B lat
+DEC Local Area Transport (LAT)
+.TP
+.B lldp
+Link-Layer Discovery Protocol
+.TP
+.B loopback
+Loopback frames (DIX Ethernet Configuration Test Protocol)
+.TP
+.B mopdl
+DEC DNA Dump/Load (MOP),
+.TP
+.B moprc
+DEC DNA Remote Console (MOP)
+.TP
+.B netbeui
+NetBIOS Frame Protocol
+.TP
+.B rarp
+Reverse ARP
+.TP
+.B sca
+DEC System Communication Architecture (SCA)
+.TP
+.B slow
+IEEE Slow Protools
+.TP
+.B stp
+IEEE Spanning Tree Protocol
+.RE
+.IP
 Note these identifiers (except \fBloopback\fP) are also keywords
 and must be escaped via backslash (\\).
 .IP
@@ -698,15 +752,7 @@ Abbreviations for:
 .fi
 .in -.5i
 where \fIprotocol\fR is one of the above protocols, all of which originated
-at DEC, but are not the same as DECnet.  Namely,
-.B lat
-is Local Area Transport (LAT),
-.B mopdl
-is DNA Dump/Load (MOP),
-.B moprc
-is DNA Remote Console (MOP) and
-.B sca
-is System Communication Architecture (SCA).
+at DEC, but are not the same as DECnet.
 .IP "\fBdecnet host \fIdecnetaddr\fR"
 True if the source or the destination DECnet address of the packet is
 .IR decnetaddr .