Two more options: - Read the source code. NGinx is some of the cleanest C code I've seen and is fairly to read / grep for added insights. - Buy a license to get

Two more options: - Read the source code. NGinx is some of the cleanest C code I've seen and is fairly to read / grep for added insights. - Buy a license to get paid support. Be aware though that they won't support you if you've modified the source code.