install-rules: use suricata-update if available

If Suricata update was bundled, use it for "install-rules" instead
of curl or wget.

Makefile.am

@@ -30,6 +30,12 @@ install-conf:
 	install -m 770 -d "$(DESTDIR)$(e_localstatedir)"
 
 install-rules:
+if HAVE_SURICATA_UPDATE
+	$(DESTDIR)$(bindir)/suricata-update \
+		--suricata $(DESTDIR)$(bindir)/suricata \
+		--suricata-conf $(DESTDIR)$(sysconfdir)/suricata/suricata.yaml \
+		--no-test --no-reload
+else
 	install -d "$(DESTDIR)$(e_sysconfrulesdir)"
 if HAVE_FETCH_COMMAND
 if HAVE_WGET_COMMAND
@@ -58,3 +64,4 @@ endif
 	@echo "While rules are installed now, it's highly recommended to use a rule manager for maintaining rules."
 	@echo "The three most common are Suricata-Update, Oinkmaster and Pulledpork. For a guide see:"
 	@echo "https://suricata.readthedocs.io/en/latest/rule-management/index.html"
+endif

configure.ac

@@ -1376,11 +1376,14 @@
   ])
 
   # suricata-update
+  have_suricata_update="no"
   AC_CHECK_FILE([$srcdir/suricata-update/setup.py], [
       SURICATA_UPDATE_DIR="suricata-update"
       AC_SUBST(SURICATA_UPDATE_DIR)
       AC_OUTPUT(suricata-update/Makefile)
+      have_suricata_update="yes"
   ])
+  AM_CONDITIONAL([HAVE_SURICATA_UPDATE], [test "x$have_suricata_update" != "xno"])
 
   # libhtp
     AC_ARG_ENABLE(non-bundled-htp,