Allow all file types for upload

I’m using WordPress 3.4.2 for a private blog, i.e. one on which only I can post. Now, WordPress prevents me from uploading certain file types (like C# source files). As far as I understand it, there’s a white-list that defines what can be uploaded.

Is there a plugin that can extend – or better, even disable – this white-list?

All other answers tell me I should edit my theme but I’d rather have a plugin for that (so that I don’t need to edit all my themes).

Also, I found this plugin but, again, it requires me to edit some file on my server (that’s probably overwritten when the plugin is updated).

So, is there anything else?

You can create a plugin or add this to the config file, but for 3.9.2 this worked for me.

define('ALLOW_UNFILTERED_UPLOADS', true);