MacOS: move ifconf to s_no_extra_traits

The derived implementations were causing a CI failure that didn't show
up before. Manually implement `PartialEq` and `Debug` to work around
this.

Author: tgross35

src/unix/bsd/apple/mod.rs

@@ -1694,6 +1694,32 @@ cfg_if! {
 
 cfg_if! {
     if #[cfg(feature = "extra_traits")] {
+        impl PartialEq for ifconf
+        where
+            Self: Copy
+        {
+            fn eq(&self, other: &Self) -> bool {
+                let len_ptr1 = core::ptr::addr_of!(self.ifc_len);
+                let len_ptr2 = core::ptr::addr_of!(other.ifc_len);
+                let ifcu_ptr1 = core::ptr::addr_of!(self.ifc_ifcu);
+                let ifcu_ptr2 = core::ptr::addr_of!(other.ifc_ifcu);
+
+                // SAFETY: `ifconf` implements `Copy` so the reads are valid
+                let len1 = unsafe { len_ptr1.read_unaligned() };
+                let len2 = unsafe { len_ptr2.read_unaligned() };
+                let ifcu1 = unsafe { ifcu_ptr1.read_unaligned() };
+                let ifcu2 = unsafe { ifcu_ptr2.read_unaligned() };
+
+                len1 == len2 && ifcu1 == ifcu2
+            }
+        }
+        impl Eq for ifconf {}
+        impl ::fmt::Debug for ifconf {
+            fn fmt(&self, f: &mut ::fmt::Formatter) -> ::fmt::Result {
+                f.debug_struct("ifconf").finish_non_exhaustive()
+            }
+        }
+
         impl PartialEq for kevent {
             fn eq(&self, other: &kevent) -> bool {
                 self.ident == other.ident
@@ -1704,6 +1730,7 @@ cfg_if! {
                     && self.udata == other.udata
             }
         }
+
         impl Eq for kevent {}
         impl fmt::Debug for kevent {
             fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {