Correct filenames so DNSSEC signs Reverse Zones

Without this change, inline signing fails to sign Reverse Zones because BIND expects to find the key files which were generated by ```dnssec-keygen``` with filenames ```/cf/named/etc/namedb/keys/K171.168.192.in-addr.arpa.+00...```.

Still, this patch does not fix the problem where keys are restored from DNSSEC backup file for a zone that was previously created, then deleted, and finally re-created. Currently, when re-creating the signed Reverse Zone, it will restore the keys from the XML config using the (wrong) old filename. DNSSEC inline signing will fail to sign the newly created Reverse Zone.

dns/pfSense-pkg-bind9/files/usr/local/pkg/bind.inc

@@ -587,9 +587,18 @@ EOD;
 									log_error("[bind] {$key_restored} DNSSEC keys restored from XML backup for {$zonename} zone.");
 								}
 								$dnssec_bin = "/usr/local/sbin/dnssec-keygen";
+								if ($zonereverso == "on") {
+									if ($zonereversv6o == "on") {
+										$z = "${zonename}.ip6.arpa";
+									} else {
+										$z = "${zonename}.in-addr.arpa";
+									}
+								} else {
+									$z = $zonename;
+								}
 								if (file_exists($dnssec_bin) && $key_restored == 0) {
-									exec("{$dnssec_bin} -K " . CHROOT_LOCALBASE . "/etc/namedb/keys {$zonename}", $kout);
-									exec("{$dnssec_bin} -K " . CHROOT_LOCALBASE . "/etc/namedb/keys -fk {$zonename}", $kout);
+									exec("{$dnssec_bin} -K " . CHROOT_LOCALBASE . "/etc/namedb/keys {$z}", $kout);
+									exec("{$dnssec_bin} -K " . CHROOT_LOCALBASE . "/etc/namedb/keys -fk {$z}", $kout);
 									foreach ($kout as $filename) {
 										chown(CHROOT_LOCALBASE . "/etc/namedb/keys/{$filename}.key", "bind");
 										chown(CHROOT_LOCALBASE . "/etc/namedb/keys/{$filename}.private", "bind");