nginx: Remove obsolete patch

With the inclusion of commit 85102dd2df
the same patch was introduced again, thus this copy can be deleted
(which accidently was never used, since I originally forgot to add it to
the SRC_URI, whoops).

Signed-off-by: Jasper Orschulko <jasper@fancydomain.eu>
Signed-off-by: Armin Kuster <akuster808@gmail.com>

meta-webserver/recipes-httpd/nginx/files/0001-HTTP-2-per-iteration-stream-handling-limit.patch

@@ -1,92 +0,0 @@
-From 2b9667f36551406169e3e2a6a774466ac70a83c0 Mon Sep 17 00:00:00 2001
-From: Maxim Dounin <mdounin@mdounin.ru>
-Date: Tue, 10 Oct 2023 15:13:39 +0300
-Subject: [PATCH] HTTP/2: per-iteration stream handling limit.
-
-To ensure that attempts to flood servers with many streams are detected
-early, a limit of no more than 2 * max_concurrent_streams new streams per one
-event loop iteration was introduced.  This limit is applied even if
-max_concurrent_streams is not yet reached - for example, if corresponding
-streams are handled synchronously or reset.
-
-Further, refused streams are now limited to maximum of max_concurrent_streams
-and 100, similarly to priority_limit initial value, providing some tolerance
-to clients trying to open several streams at the connection start, yet
-low tolerance to flooding attempts.
-
-Upstream-Status: Backport
-[https://github.com/nginx/nginx/commit/6ceef192e7af1c507826ac38a2d43f08bf265fb9]
-
-Reduces the impact of HTTP/2 Stream Reset flooding in the nginx product
-(CVE-2023-44487).
-
-See: https://www.nginx.com/blog/http-2-rapid-reset-attack-impacting-f5-nginx-products/
-
-This patch only reduces the impact and does not completely mitigate the CVE
-in question, the latter being due to a design flaw in the HTTP/2 protocol
-itself. For transparancy reasons I therefore opted to not mark the
-CVE as resolved, so that integrators can decide for themselves, wheither to
-enable HTTP/2 support or allow HTTP/1.1 connections only.
-
-Signed-off-by: Jasper Orschulko <jasper@fancydomain.eu>
----
- src/http/v2/ngx_http_v2.c | 15 +++++++++++++++
- src/http/v2/ngx_http_v2.h |  2 ++
- 2 files changed, 17 insertions(+)
-
-diff --git a/src/http/v2/ngx_http_v2.c b/src/http/v2/ngx_http_v2.c
-index 3611a2e50..291677aca 100644
---- a/src/http/v2/ngx_http_v2.c
-+++ b/src/http/v2/ngx_http_v2.c
-@@ -361,6 +361,7 @@ ngx_http_v2_read_handler(ngx_event_t *rev)
-     ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "http2 read handler");
- 
-     h2c->blocked = 1;
-+    h2c->new_streams = 0;
- 
-     if (c->close) {
-         c->close = 0;
-@@ -1320,6 +1321,14 @@ ngx_http_v2_state_headers(ngx_http_v2_connection_t *h2c, u_char *pos,
-         goto rst_stream;
-     }
- 
-+    if (h2c->new_streams++ >= 2 * h2scf->concurrent_streams) {
-+        ngx_log_error(NGX_LOG_INFO, h2c->connection->log, 0,
-+                      "client sent too many streams at once");
-+
-+        status = NGX_HTTP_V2_REFUSED_STREAM;
-+        goto rst_stream;
-+    }
-+
-     if (!h2c->settings_ack
-         && !(h2c->state.flags & NGX_HTTP_V2_END_STREAM_FLAG)
-         && h2scf->preread_size < NGX_HTTP_V2_DEFAULT_WINDOW)
-@@ -1385,6 +1394,12 @@ ngx_http_v2_state_headers(ngx_http_v2_connection_t *h2c, u_char *pos,
- 
- rst_stream:
- 
-+    if (h2c->refused_streams++ > ngx_max(h2scf->concurrent_streams, 100)) {
-+        ngx_log_error(NGX_LOG_INFO, h2c->connection->log, 0,
-+                      "client sent too many refused streams");
-+        return ngx_http_v2_connection_error(h2c, NGX_HTTP_V2_NO_ERROR);
-+    }
-+
-     if (ngx_http_v2_send_rst_stream(h2c, h2c->state.sid, status) != NGX_OK) {
-         return ngx_http_v2_connection_error(h2c, NGX_HTTP_V2_INTERNAL_ERROR);
-     }
-diff --git a/src/http/v2/ngx_http_v2.h b/src/http/v2/ngx_http_v2.h
-index 349229711..6a7aaa62c 100644
---- a/src/http/v2/ngx_http_v2.h
-+++ b/src/http/v2/ngx_http_v2.h
-@@ -125,6 +125,8 @@ struct ngx_http_v2_connection_s {
-     ngx_uint_t                       processing;
-     ngx_uint_t                       frames;
-     ngx_uint_t                       idle;
-+    ngx_uint_t                       new_streams;
-+    ngx_uint_t                       refused_streams;
-     ngx_uint_t                       priority_limit;
- 
-     ngx_uint_t                       pushing;
--- 
-2.42.1
-