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>

Makefile

@@ -56,6 +56,12 @@ bip-client:
 ethernet:
 	$(MAKE) BACDL=ethernet -s -C apps all
 
+# note: requires additional libraries to be installed
+# see .github/workflows/gcc.yml
+.PHONY: bsc
+bsc:
+	$(MAKE) BACDL=bsc -s -C apps all
+
 .PHONY: apps
 apps:
 	$(MAKE) -s -C apps all
@@ -200,6 +206,10 @@ server-client:
 server-discover:
 	$(MAKE) LEGACY=true -s -C apps $@
 
+.PHONY: sc-hub
+sc-hub:
+	$(MAKE) BACDL=bsc -s -C apps $@
+
 .PHONY: mstpcap
 mstpcap:
 	$(MAKE) -s -C apps $@
@@ -456,6 +466,7 @@ clean: ports-clean
 	$(MAKE) -s -C apps/router-ipv6 clean
 	$(MAKE) -s -C apps/router-mstp clean
 	$(MAKE) -s -C apps/gateway clean
+	$(MAKE) -s -C apps/sc-hub clean
 	$(MAKE) -s -C apps/fuzz-afl clean
 	$(MAKE) -s -C apps/fuzz-libfuzzer clean
 	$(MAKE) -s -C ports/lwip clean