netlink_route: remove NLM_F_ACK from dump requests

It seems to be a NOP with NLM_F_DUMP and setting it doesn't seem to do
anything. Checking with iproute they don't set it on dumps so let's not
do it here either.

Signed-off-by: Paul Holzinger <pholzing@redhat.com>
(cherry picked from commit c552dc4)
Signed-off-by: Paul Holzinger <pholzing@redhat.com>

Author: Luap99

src/network/netlink_route.rs

@@ -326,8 +326,7 @@ impl Socket<NetlinkRoute> {
                 table.unwrap_or(libc::RT_TABLE_MAIN.into()),
             ));
 
-        let results =
-            self.make_netlink_request(RouteNetlinkMessage::GetRoute(msg), NLM_F_DUMP | NLM_F_ACK)?;
+        let results = self.make_netlink_request(RouteNetlinkMessage::GetRoute(msg), NLM_F_DUMP)?;
 
         let mut routes = Vec::with_capacity(results.len());
 
@@ -352,8 +351,7 @@ impl Socket<NetlinkRoute> {
         let mut msg = LinkMessage::default();
         msg.attributes.append(nlas);
 
-        let results =
-            self.make_netlink_request(RouteNetlinkMessage::GetLink(msg), NLM_F_DUMP | NLM_F_ACK)?;
+        let results = self.make_netlink_request(RouteNetlinkMessage::GetLink(msg), NLM_F_DUMP)?;
 
         let mut links = Vec::with_capacity(results.len());