[nginx] Clean up trailers in ngx_http_clean_header() as well.

[Sergey Kandaurov]

details:   https://hg.nginx.org/nginx/rev/ecc0ae881a25
branches:  
changeset: 7764:ecc0ae881a25
user:      Sergey Kandaurov <pluknet at nginx.com>
date:      Tue Jan 26 12:39:28 2021 +0300
description:
Clean up trailers in ngx_http_clean_header() as well.

The function has not been updated with introduction of trailers support
in 7034:1b068a4e82d8 (1.13.2).

diffstat:

 src/http/ngx_http_special_response.c |  4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diffs (14 lines):

diff -r 61d0df8fcc7c -r ecc0ae881a25 src/http/ngx_http_special_response.c
--- a/src/http/ngx_http_special_response.c	Tue Jan 19 20:35:17 2021 +0300
+++ b/src/http/ngx_http_special_response.c	Tue Jan 26 12:39:28 2021 +0300
@@ -575,6 +575,10 @@ ngx_http_clean_header(ngx_http_request_t
     r->headers_out.headers.part.next = NULL;
     r->headers_out.headers.last = &r->headers_out.headers.part;
 
+    r->headers_out.trailers.part.nelts = 0;
+    r->headers_out.trailers.part.next = NULL;
+    r->headers_out.trailers.last = &r->headers_out.trailers.part;
+
     r->headers_out.content_length_n = -1;
     r->headers_out.last_modified_time = -1;
 }