network/dhcp: disable RapidCommit= by default when AllowList=/DenyList= is specified

AllowList= and DenyList= filter only DHCPOFFER messages. So, if
RapidCommit= is enabled, then networkd unconditionally accepts a rapid
ACK message even if its sender is filtered out by the lists.

As AllowList=/DenyList= implemented earlier than RapidCommit=, so
enabling RapidCommit= unconditionally by default may break existing
setups that use AllowList=/DenyList=.

Let's disable RapidCommit= by default when AllowList=/DenyList= is
enabled. Still the setting can be enabled by setting explicitly even
AllowList=/DenyList= is also specified.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/network/networkd-network.h b/src/network/networkd-network.h
index 4995e55b53..03131b7061 100644
--- a/src/network/networkd-network.h
+++ b/src/network/networkd-network.h
@@ -141,7 +141,7 @@ struct Network {
         bool dhcp_send_hostname_set;
         int dhcp_broadcast;
         int dhcp_ipv6_only_mode;
-        bool dhcp_use_rapid_commit;
+        int dhcp_use_rapid_commit;
         bool dhcp_use_dns;
         bool dhcp_use_dns_set;
         bool dhcp_routes_to_dns;