Uses head or get method to enumerate config backups

spec/app/finders/config_backups/known_filenames_spec.rb

@@ -8,10 +8,10 @@ describe WPScan::Finders::ConfigBackups::KnownFilenames do
   describe '#aggressive' do
     before do
       expect(target).to receive(:sub_dir).at_least(1).and_return(false)
-      expect(target).to receive(:homepage_or_404?).at_least(1).and_return(false)
+      expect(target).to receive(:head_or_get_request_params).and_return(method: :head)
 
       finder.potential_urls(opts).each_key do |url|
-        stub_request(:get, url).to_return(status: 404)
+        stub_request(:head, url).to_return(status: 404)
       end
     end
 
@@ -22,11 +22,12 @@ describe WPScan::Finders::ConfigBackups::KnownFilenames do
     end
 
     context 'when some files exist' do
-      let(:files) { ['%23wp-config.php%23', 'wp-config.bak'] }
+      let(:found_files) { ['%23wp-config.php%23', 'wp-config.bak'] }
       let(:config_backup) { File.read(fixtures.join('wp-config.php')) }
 
       before do
-        files.each do |file|
+        found_files.each do |file|
+          stub_request(:head, "#{url}#{file}").to_return(status: 200)
           stub_request(:get, "#{url}#{file}").to_return(body: config_backup)
         end
       end
@@ -34,7 +35,7 @@ describe WPScan::Finders::ConfigBackups::KnownFilenames do
       it 'returns the expected Array<ConfigBackup>' do
         expected = []
 
-        files.each do |file|
+        found_files.each do |file|
           url = "#{target.url}#{file}"
           expected << WPScan::ConfigBackup.new(
             url,