Header note X-Userid userid
Header unset X-Userid

LogFormat "%h %l %{userid}n %t "%r" %>s %b "%{Referer}i" "%{User-agent}i"" combined_with_php_userid
CustomLog /var/log/apache2/access_log combined_with_php_userid

ProxyPassMatch ^/(.*.php(/.*)?)$ fcgi://127.0.0.1:9001/var/html/$1

<VirtualHost *:80>
    ProxyPassMatch ^/(.*.php(/.*)?)$ fcgi://127.0.0.1:9001/web/ee2/sites/site.com/$1
    ServerAdmin webmaster@site.dev
    DocumentRoot /web/ee2/sites/site.com
    ServerName site.dev

    #Header note X-Userid userid
    Header set test test
    Header set X-Userid test

    ErrorLog  /var/log/apache2/site.dev-error_log
    LogFormat "%h %l %{userid}n %t "%r" %>s %b "%{Referer}i" "%{User-agent}i"" combined_with_php_userid
    # also tried: # LogFormat "%h %l %{X-Userid}i %t "%r" %>s %b "%{Referer}i" "%{User-agent}i"" combined_with_php_userid
    CustomLog /var/log/apache2/searchenginenews.com-access_log combined_with_php_userid

    <Directory /web/ee2/sites/site.com>
        AllowOverride All
        Require all granted
    </Directory>

</VirtualHost>