socket-win: Implement a Windows socket plugin using Winsock2

src/libcharon/plugins/socket_win/Makefile.am

@@ -0,0 +1,21 @@
+AM_CPPFLAGS = \
+	-I${linux_headers} \
+	-I$(top_srcdir)/src/libstrongswan \
+	-I$(top_srcdir)/src/libhydra \
+	-I$(top_srcdir)/src/libcharon
+
+AM_CFLAGS = \
+	$(PLUGIN_CFLAGS)
+
+if MONOLITHIC
+noinst_LTLIBRARIES = libstrongswan-socket-win.la
+else
+plugin_LTLIBRARIES = libstrongswan-socket-win.la
+endif
+
+libstrongswan_socket_win_la_SOURCES = \
+	socket_win_socket.h socket_win_socket.c \
+	socket_win_plugin.h socket_win_plugin.c
+
+libstrongswan_socket_win_la_LDFLAGS = -module -avoid-version
+libstrongswan_socket_win_la_LIBADD  = -lws2_32