Feature/bacnet secure connect hub (#818)

* Added BACnet Secure Connect datalink.

* Added BACnet/SC hub application
---------

Co-authored-by: Kirill Neznamov <kirill.neznamov@dsr-corporation.com>
Co-authored-by: Mikhail Antropov <michail.antropov@dsr-corporation.com>
Co-authored-by: Ondřej Hruška <ondra@ondrovo.com>
Co-authored-by: Patrick Grimm <patrick@lunatiki.de>

apps/sc-hub/README.md

@@ -0,0 +1,27 @@
+# BACnet/SC Hub
+
+Test BACnet/SC using the following steps:
+
+ * Build apps for bsc datalink:
+
+        make bsc
+
+ * Run hub app:
+
+        cd bin
+        ./bsc-server.sh
+        ./bacschub 1 Hubster
+
+ * Run server app:
+
+        cd bin
+        ./bsc-client.sh
+        ./bacserv 123 Francine
+
+ * Run any client:
+
+        cd bin
+        ./bsc-client.sh
+        ./bacwi
+        ./bacepics 1
+        ./bacepics 123