Whoops! Fixed an SQL injection vulnerability in the CLI installer. (Not like it's a huge deal because the vulnerability was only introduced last commit and if you make it to that stage you already know the database password)

# Used for testing mod_rewrite.
<IfModule mod_rewrite.c>
RewriteEngine on

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule (.*) install.php?do=modrewrite_test&str=$1
</IfModule>