mingw: enable OpenSSL

Since we have OpenSSL in msysgit now, enable it to support SSL
encryption for imap-send.

Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com>
Acked-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Makefile

@@ -933,7 +933,7 @@ else
 ifneq (,$(findstring MINGW,$(uname_S)))
 	pathsep = ;
 	NO_PREAD = YesPlease
-	NO_OPENSSL = YesPlease
+	NEEDS_CRYPTO_WITH_SSL = YesPlease
 	NO_LIBGEN_H = YesPlease
 	NO_SYMLINK_HEAD = YesPlease
 	NO_IPV6 = YesPlease