Move self-test functionality into its own file.

src/core/include.am

@@ -105,6 +105,7 @@ LIBTOR_APP_A_SOURCES = 				\
 	src/feature/relay/onion_queue.c		\
 	src/feature/relay/router.c		\
 	src/feature/relay/routerkeys.c		\
+	src/feature/relay/selftest.c		\
 	src/feature/rend/rendcache.c		\
 	src/feature/rend/rendclient.c		\
 	src/feature/rend/rendcommon.c		\
@@ -324,6 +325,7 @@ noinst_HEADERS +=					\
 	src/feature/relay/onion_queue.h			\
 	src/feature/relay/router.h			\
 	src/feature/relay/routerkeys.h			\
+	src/feature/relay/selftest.h			\
 	src/feature/rend/rend_authorized_client_st.h	\
 	src/feature/rend/rend_encoded_v2_service_descriptor_st.h	\
 	src/feature/rend/rend_intro_point_st.h		\

src/core/mainloop/mainloop.c

@@ -92,6 +92,7 @@
 #include "feature/stats/rephist.h"
 #include "feature/relay/router.h"
 #include "feature/relay/routerkeys.h"
+#include "feature/relay/selftest.h"
 #include "feature/nodelist/routerlist.h"
 #include "app/config/statefile.h"
 #include "core/or/status.h"

src/core/or/circuitbuild.c

@@ -61,6 +61,7 @@
 #include "feature/rend/rendcommon.h"
 #include "feature/stats/rephist.h"
 #include "feature/relay/router.h"
+#include "feature/relay/selftest.h"
 #include "feature/nodelist/node_select.h"
 #include "feature/nodelist/routerlist.h"
 #include "feature/nodelist/routerparse.h"

src/core/or/circuituse.c

@@ -55,6 +55,7 @@
 #include "feature/rend/rendservice.h"
 #include "feature/stats/rephist.h"
 #include "feature/relay/router.h"
+#include "feature/relay/selftest.h"
 #include "feature/nodelist/routerlist.h"
 #include "lib/math/fp.h"
 #include "lib/time/tvdiff.h"