Fix Win32 SSPI initialization for digest authentication in cURL #1102
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Since cURL 7.40.0, HTTP Digest Authentication support is now handled by Windows SSPI.
To initialize cURL, the php_curl module uses curl_global_init(CURL_GLOBAL_SSL); This call skips initializing any Win32 specific features (see curl_global_init in cURL lib/easy.c).
As a result, the SSPI interface is not initialized and attempting to use HTTP Digest Authentication results in referencing a null pointer, s_pSecFn, in Curl_sasl_create_digest_http_message (lib/curl_sasl_sspi.c).
To fix, PHP_MINIT_FUNCTION should call curl_global_init with CURL_GLOBAL_DEFAULT. This will not affect non-Win32 platforms and is the cURL recommended default.
This was tested with the official Windows PHP binaries, 5.6.6 VC11 x86 Thread Safe, running on Windows 8.1 x64.
See bug #69088 https://bugs.php.net/bug.php?id=69088