resolve: Move plugin back to libcharon

Since pluto is gone, all existing users build upon libcharon.

src/libcharon/Makefile.am

@@ -630,3 +630,10 @@ if MONOLITHIC
   libcharon_la_LIBADD += plugins/xauth_noauth/libstrongswan-xauth-noauth.la
 endif
 endif
+
+if USE_RESOLVE
+  SUBDIRS += plugins/resolve
+if MONOLITHIC
+  libcharon_la_LIBADD += plugins/resolve/libstrongswan-resolve.la
+endif
+endif

src/libcharon/plugins/resolve/Makefile.am

@@ -1,6 +1,7 @@
 AM_CPPFLAGS = \
 	-I$(top_srcdir)/src/libstrongswan \
 	-I$(top_srcdir)/src/libhydra \
+	-I$(top_srcdir)/src/libcharon \
 	-DRESOLV_CONF=\"${resolv_conf}\"
 
 AM_CFLAGS = \

src/libcharon/plugins/resolve/resolve_handler.c

@@ -374,4 +374,3 @@ resolve_handler_t *resolve_handler_create()
 
 	return &this->public;
 }
-

src/libcharon/plugins/resolve/resolve_plugin.c

@@ -99,4 +99,3 @@ plugin_t *resolve_plugin_create()
 
 	return &this->public.plugin;
 }
-

src/libhydra/Makefile.am

@@ -72,13 +72,6 @@ if MONOLITHIC
 endif
 endif
 
-if USE_RESOLVE
-  SUBDIRS += plugins/resolve
-if MONOLITHIC
-  libhydra_la_LIBADD += plugins/resolve/libstrongswan-resolve.la
-endif
-endif
-
 if MONOLITHIC
   SUBDIRS += .
 endif