Add missing inet promise.

Index: server.c
--- server.c.orig
+++ server.c
@@ -169,7 +169,7 @@ server_start(struct event_base *base, int lockfd, char
 
 #ifdef __OpenBSD__
 	if (pledge("stdio rpath wpath cpath fattr unix getpw recvfd proc exec "
-	    "tty ps", NULL) != 0)
+	    "tty ps inet", NULL) != 0)
 		fatal("pledge failed");
 #endif