so many updates

abuf.c

@@ -1,27 +0,0 @@
-#include <stdlib.h>
-#include <string.h>
-
-#include "defs.h"
-
-
-void
-ab_append(struct abuf *buf, const char *s, int len)
-{
-	char	*nc = realloc(buf->b, buf->len + len);
-
-	if (nc == NULL) {
-		abort();
-	}
-
-	memcpy(&nc[buf->len], s, len);
-	buf->b = nc;
-	buf->len += len; /* DANGER: overflow */
-}
-
-
-void
-ab_free(struct abuf *buf)
-{
-	free(buf->b);
-	buf->b = NULL;
-}