php-fpm: allow to set env variables for pools

php-fpm/defaults/main.yml

@@ -8,3 +8,4 @@ fpm_default_params:
 fpm_default_flags:
   session.cookie_secure: true
   session.cookie_httponly: true
+fpm_default_env: {}

php-fpm/templates/pool.conf.j2

@@ -34,3 +34,7 @@ php_admin_value[{{key}}] = {{value}}
 {% for key, value in (fpm_default_flags|combine(item.flags|default({}))).items() %}
 php_admin_flag[{{key}}] = {{'on' if value else 'off'}}
 {% endfor %}
+
+{% for key, value in (fpm_default_env|combine(item.env|default({}))).items() %}
+env[{{key}}] = {{ value }}
+{% endfor %}