Fix SSL version negotiation for newer versions of OpenSSL

Depending on the OpenSSL version (and custom distribution patches), `SSLv3_method()`
would return NULL on some systems and also `SSLv23_method()` fails with some older
iOS versions...
diff --git a/src/idevice.c b/src/idevice.c
index f2de6a3..1dcdae2 100644
--- a/src/idevice.c
+++ b/src/idevice.c
@@ -703,7 +703,7 @@
 	}
 	BIO_set_fd(ssl_bio, (int)(long)connection->data, BIO_NOCLOSE);
 
-	SSL_CTX *ssl_ctx = SSL_CTX_new(SSLv3_method());
+	SSL_CTX *ssl_ctx = SSL_CTX_new(TLSv1_method());
 	if (ssl_ctx == NULL) {
 		debug_info("ERROR: Could not create SSL context.");
 		BIO_free(ssl_bio);