Seems fairly stock, I'd keep this part at least:
Code
RewriteEngine on
#Options -Indexes FollowSymLinks Includes
AddType application/x-httpd-cgi .cgi
AddType text/html .html

Options +ExecCGI
AddHandler server-parsed .html
ErrorDocument 404 /errors/404.html

#RewriteBase /
RewriteCond %{REQUEST_URI} !^/[0-9]+\..+\.cpaneldcv$
RewriteCond %{REQUEST_URI} !^/[A-F0-9]{32}\.txt(?:\ Comodo\ DCV)?$

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