Close #12826: fix socketmodule.c for OpenBSD, include sys/uio.h

Patch written by Remi Pointel.
diff --git a/Misc/ACKS b/Misc/ACKS
index 062a77a..e734608 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -748,6 +748,7 @@
 Michael Piotrowski
 Antoine Pitrou
 Jean-François Piéronne
+Remi Pointel
 Guilherme Polo
 Michael Pomraning
 Iustin Pop