pkg: mark repo config a sample file, generation upcoming

pkg/Makefile

@@ -5,8 +5,8 @@ install:
 	@cp ${.CURDIR}/+POST_INSTALL ${DESTDIR}
 	@cp ${.CURDIR}/+MANIFEST ${DESTDIR}
 	@mkdir -p ${DESTDIR}/usr/local/etc/pkg/repos
-	@cp ${.CURDIR}/OPNsense.conf ${DESTDIR}/usr/local/etc/pkg/repos
-	@echo /usr/local/etc/pkg/repos/OPNsense.conf
+	@cp ${.CURDIR}/OPNsense.conf.sample ${DESTDIR}/usr/local/etc/pkg/repos
+	@echo "@sample /usr/local/etc/pkg/repos/OPNsense.conf.sample"
 	@cp ${.CURDIR}/pkg.conf ${DESTDIR}/usr/local/etc
 	@echo /usr/local/etc/pkg.conf
 	@cp ${.CURDIR}/config.xml.sample ${DESTDIR}/usr/local/etc

pkg/OPNsense.conf → pkg/OPNsense.conf.sample

 OPNsense: {
   fingerprints: "/usr/local/etc/pkg/fingerprints/OPNsense",
-  url: "pkg+http://pkg.opnsense.org/${ABI}/%%REPO_FLAVOUR%%",
+  url: "pkg+http://pkg.opnsense.org/${ABI}/latest",
   signature_type: "fingerprints",
   mirror_type: "srv",
   priority: 11,