Control: Add monitoring server with ETCP protocol support

- Implement control_server.c/h for monitoring and management
- Add Windows-compatible uasync_poll using select() instead of WSAPoll
- Fix Wintun adapter creation to open existing adapters first
- Add debug category for control server operations
- Update build files to include control server in compilation
- Add test_control_server to test suite

tests/Makefile.am

@@ -24,6 +24,7 @@ check_PROGRAMS = \
 	test_bgp_route_exchange \
 	test_routing_mesh \
 	test_etcp_dummynet \
+	test_control_server \
 	bench_timeout_heap \
 	bench_uasync_timeouts
 
@@ -209,6 +210,11 @@ bench_uasync_timeouts_SOURCES = bench_uasync_timeouts.c
 bench_uasync_timeouts_CFLAGS = -I$(top_srcdir)/lib
 bench_uasync_timeouts_LDADD = $(COMMON_LIBS)
 
+# Control Server Test - Tests the ETCP monitoring protocol
+test_control_server_SOURCES = test_control_server.c
+test_control_server_CFLAGS = -I$(top_srcdir)/src -I$(top_srcdir)/lib -I$(top_srcdir)/tools/etcpmon
+test_control_server_LDADD = $(top_builddir)/src/utun-control_server.o $(COMMON_LIBS)
+
 # Build tinycrypt objects before tests that need them
 BUILT_SOURCES = $(TINYCRYPT_BUILT)