Deprecate rustix::net::SendFlags::EOT and add EOR. (#1054)

* Deprecate `rustix::net::SendFlags::EOT` and add `EOR`.

In `rustix::net::SendFlags`, deprecate the mis-spelled `EOT` and add the
correctly-spelled `EOT`.

Fixes #1053.

* Fix the libc backend too.

Author: sunfishcode

src/backend/libc/net/send_recv.rs

@@ -27,9 +27,13 @@ bitflags! {
         /// `MSG_DONTWAIT`
         #[cfg(not(windows))]
         const DONTWAIT = bitcast!(c::MSG_DONTWAIT);
-        /// `MSG_EOR`
+        /// Deprecated alias for [`EOR`].
         #[cfg(not(windows))]
+        #[deprecated(note = "`rustix::net::SendFlags::EOT` is renamed to `rustix::net::SendFlags::EOR`.")]
         const EOT = bitcast!(c::MSG_EOR);
+        /// `MSG_EOR`
+        #[cfg(not(windows))]
+        const EOR = bitcast!(c::MSG_EOR);
         /// `MSG_MORE`
         #[cfg(not(any(
             bsd,

src/backend/linux_raw/net/send_recv.rs

@@ -16,8 +16,11 @@ bitflags! {
         const DONTROUTE = c::MSG_DONTROUTE;
         /// `MSG_DONTWAIT`
         const DONTWAIT = c::MSG_DONTWAIT;
-        /// `MSG_EOT`
+        /// Deprecated alias for [`EOR`].
+        #[deprecated(note = "`rustix::net::SendFlags::EOT` is renamed to `rustix::net::SendFlags::EOR`.")]
         const EOT = c::MSG_EOR;
+        /// `MSG_EOR`
+        const EOR = c::MSG_EOR;
         /// `MSG_MORE`
         const MORE = c::MSG_MORE;
         /// `MSG_NOSIGNAL`