init: Provide a service file for charon-systemd using swanctl

configure.ac

@@ -1566,6 +1566,7 @@ AC_CONFIG_FILES([
 	man/Makefile
 	init/Makefile
 	init/systemd/Makefile
+	init/systemd-swanctl/Makefile
 	src/Makefile
 	src/include/Makefile
 	src/libstrongswan/Makefile

init/Makefile.am

@@ -4,3 +4,9 @@ SUBDIRS =
 if USE_LEGACY_SYSTEMD
   SUBDIRS += systemd
 endif
+
+if USE_SYSTEMD
+if USE_SWANCTL
+  SUBDIRS += systemd-swanctl
+endif
+endif

init/systemd-swanctl/.gitignore

@@ -0,0 +1 @@
+strongswan-swanctl.service

init/systemd-swanctl/Makefile.am

@@ -0,0 +1,11 @@
+
+EXTRA_DIST = strongswan-swanctl.service.in
+CLEANFILES = strongswan-swanctl.service
+
+systemdsystemunit_DATA = strongswan-swanctl.service
+
+strongswan-swanctl.service : strongswan-swanctl.service.in
+	$(AM_V_GEN) \
+	sed \
+	-e "s:@SBINDIR@:$(sbindir):" \
+	$(srcdir)/$@.in > $@

init/systemd-swanctl/strongswan-swanctl.service.in

@@ -0,0 +1,9 @@
+[Unit]
+Description=strongSwan IPsec IKEv1/IKEv2 daemon using swanctl
+After=network.target
+
+[Service]
+Type=notify
+ExecStart=@SBINDIR@/charon-systemd
+ExecStartPost=@SBINDIR@/swanctl --load-all --noprompt
+ExecReload=@SBINDIR@/swanctl --reload