dma: Don't only use TLSv1

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

src/patches/dma-0.10-better-tls.patch

@@ -0,0 +1,26 @@
+commit e94f50bbbe7318eec5b6b165ff73d94bbc9d20b0
+Author: Michael Tremer <michael.tremer@ipfire.org>
+Date:   Sun Feb 11 11:05:43 2018 +0000
+
+    crypto: Don't limit to TLSv1 only
+    
+    Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
+
+diff --git a/crypto.c b/crypto.c
+index 897b55bfdcfc..440c882880b5 100644
+--- a/crypto.c
++++ b/crypto.c
+@@ -93,7 +93,12 @@ smtp_init_crypto(int fd, int feature)
+ 	SSL_library_init();
+ 	SSL_load_error_strings();
+ 
+-	meth = TLSv1_client_method();
++	// Allow any possible version
++#if (OPENSSL_VERSION_NUMBER >= 0x10100000L)
++	meth = TLS_client_method();
++#else
++	meth = SSLv23_client_method();
++#endif
+ 
+ 	ctx = SSL_CTX_new(meth);
+ 	if (ctx == NULL) {