blacklistd: use file_line in /etc/rc.conf

The configuration fragments in /etc/rc.conf.d won't apply correctly.
Move the configuration to /etc/rc.conf instead.

files/blacklistd

-blacklistd_enable="YES"
-sshd_flags="-o UseBlacklist=yes"

manifests/blacklistd.pp

 #
 class freebsd::blacklistd {
-  file { '/etc/rc.conf.d/blacklistd':
-    ensure => file,
-    source => 'puppet:///modules/freebsd/blacklistd',
-    owner  => 'root',
-    group  => 'wheel',
-    mode   => '0644',
+  file_line { 'Enable blacklistd':
+    path => '/etc/rc.conf',
+    line => 'blacklistd_enable="YES"',
   }
-  file { '/etc/ipfw-blacklistd.rc':
-    content => '',
-    owner   => 'root',
-    group   => 'wheel',
-    mode    => '0644',
+  file_line { 'Enable blacklistd support in sshd':
+    path => '/etc/rc.conf',
+    line => 'sshd_flags="-o UseBlacklist=yes"',
   }
 }