Add mysite.html to your robots.txt file or click the 'no way' sign for the page from the admin panel. Alternatively, check out the following code in the config file and see
this thread.
Code:
// in PhpDig 1.8.8 RC1
// regexp for forbidden links - some links may return text/html mime-type but should not be indexed so forbid them !!!
// you can also expand the FORBIDDEN value by writing a regex to forbid certain links containing 'word' from being indexed
define('FORBIDDEN','\.(js|inc|rm|ico|cab|swf|css|gz|z|tar|zip|tgz|msi|arj|zoo|rar|r[0-9]+|exe|bin|pkg|rpm|deb|bz2)$');
// in PhpDig 1.8.7
// regexp forbidden extensions - return sometimes text/html mime-type !!!
define('FORBIDDEN_EXTENSIONS','\.(rm|ico|cab|swf|css|gz|z|tar|zip|tgz|msi|arj|zoo|rar|r[0-9]+|exe|bin|pkg|rpm|deb|bz2)$');