title: Get all client headers in FastCGI (C/C++)
body: <p>currently I am struggeling with a little problem:<br>
  I want create FastCGI/CGI binding for the <a href="http://nekovm.org">nekoVM</a>. This is done by writing some clue C/C++ code that is loaded by the VM. I want to make the behaviour of my binding as compatible as possible with neko native API (mod_neko, mod_tora). With mod_neko it is possible to get all HTTP headers the client send.<br>
  As far as I know you can get HTTP headers with FastCGI only by calling <code>getenv('header_name')</code>. To use this function you need to know the name of all headers.</p>
  
  <p>My question: Is there any possibility to get all headers the client send?</p>