rtnetlink.7: Minor wording fixes

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

man7/rtnetlink.7

@@ -26,12 +26,12 @@ Rtnetlink allows the kernel's routing tables to be read and altered.
 It is used within the kernel to communicate between
 various subsystems, though this usage is not documented here, and for
 communication with user-space programs.
-Network routes, ip addresses, link parameters, neighbor setups, queueing
+Network routes, IP addresses, link parameters, neighbor setups, queueing
 disciplines, traffic classes and packet classifiers may all be controlled
 through
 .B NETLINK_ROUTE
 sockets.
-It is based on netlink messages, see
+It is based on netlink messages; see
 .BR netlink (7)
 for more information.
 .\" FIXME ? all these macros could be moved to rtnetlink(3)
@@ -105,14 +105,14 @@ The value type for IFLA_STATS is \fIstruct net_device_stats\fP.
 .BR RTM_NEWADDR ", " RTM_DELADDR ", " RTM_GETADDR
 Add, remove or receive information about an IP address associated with
 an interface.
-In Linux 2.2 an interface can carry multiple IP addresses,
+In Linux 2.2, an interface can carry multiple IP addresses,
 this replaces the alias device concept in 2.0.
-In Linux 2.2 these messages
+In Linux 2.2, these messages
 support IPv4 and IPv6 addresses.
 They contain an
 .I ifaddrmsg
 structure, optionally followed by
-.I rtaddr
+.I rtattr
 routing attributes.
 
 .nf
@@ -168,16 +168,16 @@ structure with an optional sequence of
 .I rtattr
 structures following.
 For
-.B RTM_GETROUTE
+.BR RTM_GETROUTE ,
 setting
 .I rtm_dst_len
 and
 .I rtm_src_len
 to 0 means you get all entries for the specified routing table.
-For the other fields except
+For the other fields, except
 .I rtm_table
 and
-.I rtm_protocol
+.IR rtm_protocol ,
 0 is the wildcard.
 
 .nf