Add dyad.c networking library

README.md

@@ -619,6 +619,7 @@ comprehensive and high-level, you may want the Web Frameworks section.
 * [CHL][422] - C Hypertext Library - A library for writing web applications in
   C. [``GPL-3.0-only``][GPL-3.0-only]
 * [czmq][226] - High-level binding for ZeroMQ. [``MPL-2.0``][MPL-2.0]
+* [Dyad.c][554] - Lightweight, easy, asynchronous networking library. [``MIT``][MIT]
 * [GNU adns][155] - Advanced, easy-to-use, asynch-capable DNS client library
   and utilities. [``GPL-3.0-or-later``][GPL-3.0-or-later]
 * [gumbo-parser][196] - HTML5 parsing library in C99.
@@ -1662,3 +1663,4 @@ support for C.
 [551]: https://github.com/mysql/mysql-server
 [552]: https://github.com/hexspeakerg/ONLY_ONCE
 [553]: https://github.com/okuvshynov/b63
+[554]: https://github.com/rxi/dyad