cakephp subdomain htaccess

<IfModule mod_rewrite.c>
    RewriteEngine on
    RewriteBase /

    # http|https www to non-www
    RewriteCond %{HTTP_HOST} ^www\.(.*)$ [NC]
    RewriteCond %{HTTPS}s ^on(s)|
    RewriteRule ^(.*)$ http%1://domain.com/$1 [R=301,L]

    # redirect all subdomains
    RewriteCond %{HTTP_HOST} !^domain\.(.*)$ [NC]
    RewriteCond %{HTTPS} on
    RewriteRule ^(.*)$ /%{HTTP_HOST}/$1 [NC,L,NS]

    RewriteCond %{HTTP_HOST} ^domain\.(.*)$ [NC]
    RewriteRule ^$ app/webroot/    [L]
    RewriteCond %{HTTP_HOST} ^domain\.(.*)$ [NC]
    RewriteRule (.*) app/webroot/$1 [L]
</IfModule>

/public_html/sub1.domain.com/.htaccess

<IfModule mod_rewrite.c>
    RewriteEngine on
    RewriteBase /

    RewriteCond %{REQUEST_URI} ^/%{HTTP_HOST}
    RewriteRule ^%{HTTP_HOST}(.*)$ /$1

    RewriteCond %{HTTPS} on
    RewriteRule ^$ %{HTTP_HOST}/app/webroot/    [L]
    RewriteCond %{HTTPS} on
    RewriteRule (.*) %{HTTP_HOST}/app/webroot/$1 [L]

    RewriteRule ^$ app/webroot/    [L]
    RewriteRule (.*) app/webroot/$1 [L]
</IfModule>

/public_html/sub1.domain.com/app/.htaccess

<IfModule mod_rewrite.c>
    RewriteEngine on
    RewriteBase /
    RewriteRule ^$    webroot/    [L]
    RewriteRule (.*) webroot/$1    [L]
</IfModule>

/public_html/sub1.domain.com/app/webroot/.htaccess

<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteBase /

    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{HTTPS} on
    RewriteRule ^(.*)$ %{HTTP_HOST}/index.php [QSA,L]

    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{HTTPS} !on
    RewriteRule ^(.*)$ index.php [QSA,L]
</IfModule>