Updated usrsctp to fix various issues for windows (using changes pushed upstream) and unified SHA1 …

third_party/usrsctp/overrides/usrsctplib/netinet/sctp_sha1.h

Index: third_party/usrsctp/overrides/usrsctplib/netinet/sctp_sha1.h
diff --git a/third_party/usrsctp/overrides/usrsctplib/netinet/sctp_sha1.h b/third_party/usrsctp/overrides/usrsctplib/netinet/sctp_sha1.h
index 4000e41d78fe237b7cffa0053c27bd945e5ba7e2..006e9209006e12be499c44368cefcb2811fb7e62 100644
--- a/third_party/usrsctp/overrides/usrsctplib/netinet/sctp_sha1.h
+++ b/third_party/usrsctp/overrides/usrsctplib/netinet/sctp_sha1.h
@@ -40,11 +40,30 @@ __FBSDID("$FreeBSD$");
 #define __SCTP_SHA1_h__
 
 #include <sys/types.h>
-#ifdef SCTP_USE_NSS_SHA1
+
+#if !defined(SSL_USE_OPENSSL) && !defined(SSL_USE_NSS)
+#if defined(WIN32)
+
+#define SCTP_USE_SCTP_SHA1 1
+
+#else  // defined(WIN32)
+
+#if defined(HAVE_OPENSSL_SSL_H)
+#define SSL_USE_OPENSSL 1
+#elif defined(HAVE_NSS_SSL_H)
+#define SSL_USE_NSS 1
+#else
+#define SCTP_USE_SCTP_SHA1
+#endif
+
+#endif  // !defined(WIN32)
+#endif
+
+#if defined(SSL_USE_NSS)
 #include <netinet/sctp_nss_sha1.h>
-#elif SCTP_USE_OPENSSL_SHA1
+#elif defined(SSL_USE_OPENSSL)
 #include <netinet/sctp_openssl_sha1.h>
-#else  // USE_SCTP_SHA1
+#else  // SCTP_USE_SCTP_SHA1
 struct sha1_context {
 	unsigned int A;
 	unsigned int B;
@@ -99,5 +118,5 @@ void SHA1_Update(struct sha1_context *, const unsigned char *, int);
 void SHA1_Final(unsigned char *, struct sha1_context *);
 
 #endif				/* _KERNEL */
-#endif
-#endif
+#endif        /* !defined(SSL_USE_OPENSSL) && !defined(SSL_USE_NSS) */
+#endif        /* __SCTP_SHA1_h__ */