h2: defend against no NUL possible in log

lib/roles/h2/hpack.c

@@ -1391,8 +1391,15 @@ int lws_add_http2_header_by_name(struct lws *wsi, const unsigned char *name,
 {
 	int len;
 
-	lwsl_header("%s: %p  %s:%s (len %d)\n", __func__, *p, name, value,
-					length);
+#if defined(_DEBUG)
+	/* value does not have to be NUL-terminated... %.*s not available on
+	 * all platforms */
+	lws_strnncpy((char *)*p, (const char *)value, length,
+			lws_ptr_diff(end, (*p)));
+
+	lwsl_header("%s: %p  %s:%s (len %d)\n", __func__, *p, name,
+			(const char *)*p, length);
+#endif
 
 	len = (int)strlen((char *)name);
 	if (len)

lib/roles/h2/http2.c

@@ -2040,6 +2040,10 @@ lws_h2_parser(struct lws *wsi, unsigned char *in, lws_filepos_t inlen,
 				    h2n->swsi->http.rx_content_remain <
 						    inlen + 1 && /* last */
 				    h2n->inside < h2n->length) {
+					lwsl_warn("%s: rem %d, inlen %d\n",
+						  __func__,
+						  (int)h2n->swsi->http.rx_content_remain,
+						  (int)inlen + 1);
 					/* unread data in frame */
 					lws_h2_goaway(wsi,
 						      H2_ERR_PROTOCOL_ERROR,

lib/roles/http/server/server.c

@@ -2334,7 +2334,7 @@ lws_http_transaction_completed(struct lws *wsi)
 		peer[0] = '\0';
 #endif
 		peer[sizeof(peer) - 1] = '\0';
-		lwsl_notice("%s: (from %s) ignoring, ah parsing incomplete\n",
+		lwsl_info("%s: (from %s) ignoring, ah parsing incomplete\n",
 				__func__, peer);
 		return 0;
 	}