note about the need for extra functions set to OpenSSL if you use OpenSSL

 handlers. Signals are needed for a SIGPIPE handler, and the alarm() syscall

 is used to catch timeouts (mostly during DNS lookup).

 So when using multiple threads you should first ignore SIGPIPE in your main

 If you are accessing HTTPS or FTPS URLs in a multi-threaded manner, you are

 then of course using OpenSSL multi-threaded and it has itself a few

 requirements on this. Basicly, you need to provide one or two functions to

 allow it to function properly. For all details, see this:

   http://www.openssl.org/docs/crypto/threads.html#DESCRIPTION

 When using multiple threads you should first ignore SIGPIPE in your main

 thread and set the CURLOPT_NOSIGNAL option to TRUE for all handles.

 Everything will work fine except that timeouts are not honored during the DNS