title: Autofold #ifdef..#endif in vim via .vimrc
body: <p>I have seen partial solutions over the internet but none that really satisfied me: what do I have to put into my .vimrc (ideally I don't want to chance any syntax/*.vim file) such that in all .c/cpp/h files that I open, I get automatic folding of <code>#ifdef ... #endif</code> sections?</p>