Reworked multi headers to use linked lists.

Multi headers are now using linked lists instead of arrays.  Notably,
the following fields were changed: r->headers_in.cookies (renamed
to r->headers_in.cookie), r->headers_in.x_forwarded_for,
r->headers_out.cache_control, r->headers_out.link, u->headers_in.cache_control
u->headers_in.cookies (renamed to u->headers_in.set_cookie).

The r->headers_in.cookies and u->headers_in.cookies fields were renamed
to r->headers_in.cookie and u->headers_in.set_cookie to match header names.

The ngx_http_parse_multi_header_lines() and ngx_http_parse_set_cookie_lines()
functions were changed accordingly.

With this change, multi headers are now essentially equivalent to normal
headers, and following changes will further make them equivalent.

1 files changed, 3 insertions, 4 deletions

diff --git a/src/http/modules/ngx_http_realip_module.c b/src/http/modules/ngx_http_realip_module.c
index 9586ebe07..f6731e780 100644
--- a/src/http/modules/ngx_http_realip_module.c
+++ b/src/http/modules/ngx_http_realip_module.c
@@ -134,9 +134,8 @@ ngx_http_realip_handler(ngx_http_request_t *r)
     ngx_str_t                   *value;
     ngx_uint_t                   i, hash;
     ngx_addr_t                   addr;
-    ngx_array_t                 *xfwd;
     ngx_list_part_t             *part;
-    ngx_table_elt_t             *header;
+    ngx_table_elt_t             *header, *xfwd;
     ngx_connection_t            *c;
     ngx_http_realip_ctx_t       *ctx;
     ngx_http_realip_loc_conf_t  *rlcf;
@@ -168,9 +167,9 @@ ngx_http_realip_handler(ngx_http_request_t *r)
 
     case NGX_HTTP_REALIP_XFWD:
 
-        xfwd = &r->headers_in.x_forwarded_for;
+        xfwd = r->headers_in.x_forwarded_for;
 
-        if (xfwd->elts == NULL) {
+        if (xfwd == NULL) {
             return NGX_DECLINED;
         }