fix build on DragonFly: IP_RECVTOS and join_leave_ssm_v4() disabled

Author: kworr

src/socket.rs

@@ -1418,6 +1418,7 @@ impl Socket {
     /// incoming packets. It contains a byte which specifies the
     /// Type of Service/Precedence field of the packet header.
     #[cfg(not(any(
+        target_os = "dragonfly",
         target_os = "fuchsia",
         target_os = "illumos",
         target_os = "netbsd",
@@ -1444,6 +1445,7 @@ impl Socket {
     ///
     /// [`set_recv_tos`]: Socket::set_recv_tos
     #[cfg(not(any(
+        target_os = "dragonfly",
         target_os = "fuchsia",
         target_os = "illumos",
         target_os = "netbsd",

src/sys/unix.rs

@@ -75,6 +75,7 @@ pub(crate) use libc::{MSG_TRUNC, SO_OOBINLINE};
 #[cfg(all(feature = "all", not(target_os = "redox")))]
 pub(crate) use libc::IP_HDRINCL;
 #[cfg(not(any(
+    target_os = "dragonfly",
     target_os = "fuchsia",
     target_os = "illumos",
     target_os = "netbsd",

tests/socket.rs

@@ -1186,6 +1186,7 @@ test!(IPv4 ttl, set_ttl(40));
 test!(IPv4 tos, set_tos(96));
 
 #[cfg(not(any(
+    target_os = "dragonfly",
     target_os = "fuchsia",
     target_os = "illumos",
     target_os = "netbsd",
@@ -1244,6 +1245,7 @@ fn join_leave_multicast_v4_n() {
 
 #[test]
 #[cfg(not(any(
+    target_os = "dragonfly",
     target_os = "haiku",
     target_os = "netbsd",
     target_os = "redox",