libhydra: Move kernel interface to libcharon

This moves hydra->kernel_interface to charon->kernel.

src/starter/Makefile.am

@@ -16,6 +16,7 @@ AM_CPPFLAGS = \
 	-I${linux_headers} \
 	-I$(top_srcdir)/src/libstrongswan \
 	-I$(top_srcdir)/src/libhydra \
+	-I$(top_srcdir)/src/libcharon \
 	-I$(top_srcdir)/src/starter \
 	-I$(top_srcdir)/src/stroke \
 	-DIPSEC_DIR=\"${ipsecdir}\" \
@@ -33,6 +34,7 @@ AM_YFLAGS = -v -d
 starter_LDADD = \
 	$(top_builddir)/src/libstrongswan/libstrongswan.la \
 	$(top_builddir)/src/libhydra/libhydra.la \
+	$(top_builddir)/src/libcharon/libcharon.la \
 	libstarter.la \
 	$(SOCKLIB) $(PTHREADLIB)
 

src/starter/netkey.c

@@ -17,7 +17,6 @@
 #include <stdlib.h>
 
 #include <library.h>
-#include <hydra.h>
 #include <utils/debug.h>
 
 #include "files.h"