Support --openssl-legacy-providers on Windows, too (GH-15747)

This is not necessarily useful for Windows (few use custom builds on
that platform), but for feature parity with other platforms it seems
reasonable to support it on Windows.

We make sure, though, that the feature is not enabled for snapshot
builds by adding the option to the build exclusions.

Author: cmb69

ext/openssl/config.w32

@@ -2,11 +2,16 @@
 
 ARG_WITH("openssl", "OpenSSL support", "no,shared");
 
+ARG_WITH("openssl-legacy-provider", "OPENSSL: Load legacy algorithm provider in addition to default provider", "no");
+
 if (PHP_OPENSSL != "no") {
 	var ret = SETUP_OPENSSL("openssl", PHP_OPENSSL);
 
 	if (ret >= 2) {
 		EXTENSION("openssl", "openssl.c xp_ssl.c");
 		AC_DEFINE("HAVE_OPENSSL_EXT", 1, "Define to 1 if the PHP extension 'openssl' is available.");
+		if (PHP_OPENSSL_LEGACY_PROVIDER != "no") {
+			AC_DEFINE("LOAD_OPENSSL_LEGACY_PROVIDER", 1, "Define to 1 to load the OpenSSL legacy algorithm provider in addition to the default provider.");
+		}
 	}
 }

win32/build/confutils.js

@@ -456,7 +456,7 @@ can be built that way. \
 	var snapshot_build_exclusions = new Array(
 		'debug', 'lzf-better-compression', 'php-build', 'snapshot-template', 'zts',
 		'ipv6', 'fd-setsize', 'pgi', 'pgo', 'all-shared', 'config-profile', 'sanitizer',
-		'phpdbg-debug'
+		'phpdbg-debug', 'openssl-legacy-provider'
 	);
 	var force;