Description:
------------
I run the docker container with 300 env variable, but php-fpm is always down.
When I research I found that fpm return 104 code if env weight more 8000 bytes.
I try on the dockerized 8.1.0beta1, 8, 7.4, 7.2 and 7.3 from deb on the debian os.
alpine work when `env | wc -c` less 7995
debian container work when `env | wc -c` less 8119
Simple reproduce by docker-compose from `Test script:` section and check by cgi-fcgi from `Expected result:` section.



Test script:
---------------
docker-compose.yaml
version: "3"
services:
  fpm:
    image: php:8.1.0beta1-fpm-alpine3.14
#    image: php:8-fpm
#    image: php:7.4-fpm
#    image: php:7.2-fpm
    env_file: .env
    volumes:
      - ./www.conf:/usr/local/etc/php-fpm.d/www.conf

www.conf
[global]
log_level = debug
error_log = /tmp/php-fpm.log

[www]
user = www-data
group = www-data
listen = 9000
pm = dynamic
pm.max_spare_servers = 1
pm.min_spare_servers = 1
pm.start_servers = 1
pm.max_children = 1
pm.max_requests = 1
pm.status_path = /fpm-status

.env with any contents, many short ENV=value or one BIG_ENV=8000_simbols


Expected result:
----------------
root@4624397c329e:/www# env | wc -c
8118
root@4624397c329e:/www# SCRIPT_NAME=/fpm-status SCRIPT_FILENAME=/ REQUEST_METHOD=GET /usr/bin/cgi-fcgi -bind -connect localhost:9000 && echo $?
0

Actual result:
--------------
root@835b25c9bd0a:/www# env | wc -c
8119
root@835b25c9bd0a:/www# SCRIPT_NAME=/fpm-status SCRIPT_FILENAME=/ REQUEST_METHOD=GET /usr/bin/cgi-fcgi -bind -connect localhost:9000; echo $?
104