Commit: runtime(nginx): Update nginx syntax script

[Christian Brabandt]

runtime(nginx): Update nginx syntax script

Commit: https://github.com/vim/vim/commit/4442ac53f7370bf7e182e19771c71e9000f123e1
Author: Chris Aumann <m...@chr4.org>
Date: Sun Feb 8 21:24:00 2026 +0000

runtime(nginx): Update nginx syntax script

closes: https://github.com/vim/vim/issues/19374

Signed-off-by: Chris Aumann <m...@chr4.org>
Signed-off-by: Christian Brabandt <c...@256bit.org>

diff --git a/runtime/syntax/nginx.vim b/runtime/syntax/nginx.vim
index b9aa85f48..e31f13971 100644
--- a/runtime/syntax/nginx.vim
+++ b/runtime/syntax/nginx.vim
@@ -1,8 +1,7 @@
" Vim syntax file
" Language: nginx.conf
" Maintainer: Chris Aumann <m...@chr4.org>
-" Last Change: Nov 25, 2023
-" 2025 Jun 08 by Vim Project: improve syntax (#17458)
+" Last Change: Jan 09, 2026

if exists("b:current_syntax")
finish
@@ -390,7 +389,6 @@ syn keyword ngxDirective proxy_buffering
syn keyword ngxDirective proxy_buffers
syn keyword ngxDirective proxy_busy_buffers_size
syn keyword ngxDirective proxy_cache
-syn keyword ngxDirective proxy_cache_background_update
syn keyword ngxDirective proxy_cache_bypass
syn keyword ngxDirective proxy_cache_convert_head
syn keyword ngxDirective proxy_cache_key