Cache: fixed race in ngx_http_file_cache_forced_expire(). During configuration reload two cache managers might exist for a short time. If both tried to delete the same cache node, the "ignore long locked inactive cache entry" alert appeared in logs. Additionally, ngx_http_file_cache_forced_expire() might be also called by worker processes, with similar results. Fix is to ignore cache nodes being deleted, similarly to how it is done in ngx_http_file_cache_expire() since 3755:76e3a93821b1. This was somehow missed in 7002:ab199f0eb8e8, when ignoring long locked cache entries was introduced in ngx_http_file_cache_forced_expire().

# Copyright (C) Igor Sysoev
# Copyright (C) Nginx, Inc.


ngx_include="unistd.h";      . auto/include
ngx_include="inttypes.h";    . auto/include
ngx_include="limits.h";      . auto/include
ngx_include="sys/filio.h";   . auto/include
ngx_include="sys/param.h";   . auto/include
ngx_include="sys/mount.h";   . auto/include
ngx_include="sys/statvfs.h"; . auto/include
ngx_include="crypt.h";       . auto/include