Add warning about not handling EINTR to crate docs

Author: Thomasdezeeuw

src/lib.rs

@@ -13,9 +13,10 @@
 //! This crate is sort of an evolution of the `net2` crate after seeing the
 //! issues on it over time. The intention of this crate is to provide as direct
 //! as possible access to the system's functionality for sockets as possible. No
-//! extra fluff (e.g. multiple syscalls or builders) provided in this crate. As
-//! a result using this crate can be a little wordy, but it should give you
-//! maximal flexibility over configuration of sockets.
+//! extra fluff (e.g. multiple syscalls or builders) provided in this crate.
+//! This also means it doesn't handle errors such as `EINTR`. As a result using
+//! this crate can be a little wordy, but it should give you maximal flexibility
+//! over configuration of sockets.
 //!
 //! # Examples
 //!