rc: move rc back to /usr/local

We use grep and awk for early automation.  Deal with this later.

+POST_INSTALL

@@ -16,7 +16,7 @@ cp /etc/rc /etc/rc.bak
 cat > /etc/rc <<EOF
 #!/bin/sh
 # OPNsense rc(8) hook was automatically installed:
-if [ -f /etc/rc.opnsense ]; then exec /etc/rc.opnsense; fi
+if [ -f /usr/local/etc/rc ]; then exec /usr/local/etc/rc; fi
 EOF
 cat /etc/rc.bak >> /etc/rc
 rm -f /etc/rc.bak

plist

@@ -1,6 +1,5 @@
 /boot/brand-opnsense.4th
 /boot/logo-hourglass.4th
-/etc/rc.opnsense
 /usr/local/etc/devd/carp.conf
 /usr/local/etc/devd/ifnet.conf
 /usr/local/etc/dh-parameters.2048.rfc7919
@@ -76,6 +75,7 @@
 /usr/local/etc/pkg/fingerprints/OPNsense/revoked/pkg.opnsense.org.20171219
 /usr/local/etc/pkg/fingerprints/OPNsense/trusted/opnsense-update.deciso.com.20180627
 /usr/local/etc/pkg/fingerprints/OPNsense/trusted/pkg.opnsense.org.20180614
+/usr/local/etc/rc
 /usr/local/etc/rc.bootup
 /usr/local/etc/rc.configure_firmware
 /usr/local/etc/rc.configure_interface