Concrete5.7+ in subfolder with hidden subfolder

Concrete5.7 .htaccess

# BEGIN Concrete5 rewrite
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /

RewriteCond %{REQUEST_URI} !^/c5/

# exclude other sub-directories if necessary
RewriteCond %{REQUEST_URI} !^/dev/
RewriteCond %{REQUEST_URI} !^/dev2/

# exclude ssl stuff
RewriteCond %{REQUEST_URI} !^/[0-9]+\..+\.cpaneldcv$
RewriteCond %{REQUEST_URI} !^/[A-F0-9]{32}\.txt(?:\ Comodo\ DCV)?$
RewriteCond %{REQUEST_URI} !^/\.well-known/acme-challenge/[0-9a-zA-Z_-]+$

RewriteRule ^(.*)$ c5/$1 [L]

</IfModule>

index.php

<?php
$myappfolder = 'c5/';
$_SERVER['PHP_SELF'] = str_replace($myappfolder, '', $_SERVER['PHP_SELF']);
$_SERVER['SCRIPT_NAME'] = str_replace($myappfolder, '', $_SERVER['SCRIPT_NAME']);

require 'concrete/dispatcher.php';