Sync OpenBSD patchset 1150:

xfree is not particularly helpful, remove it. From Thomas Adam.

server-fn.c

@@ -18,6 +18,7 @@
 
 #include <sys/types.h>
 
+#include <stdlib.h>
 #include <string.h>
 #include <time.h>
 #include <unistd.h>
@@ -393,7 +394,7 @@ server_destroy_session_group(struct session *s)
 		TAILQ_FOREACH(s, &sg->sessions, gentry)
 			server_destroy_session(s);
 		TAILQ_REMOVE(&session_groups, sg, entry);
-		xfree(sg);
+		free(sg);
 	}
 }