Adds additional message when checksums mismatch during an update

lib/wpscan/db/updater.rb

@@ -148,7 +148,7 @@ module WPScan
             create_backup(filename)
             dl_checksum = download(filename)
 
-            raise "#{filename}: checksums do not match" unless dl_checksum == db_checksum
+            raise Error::ChecksumsMismatch, filename unless dl_checksum == db_checksum
 
             updated << filename
           rescue StandardError => e

lib/wpscan/errors/update.rb

@@ -8,5 +8,17 @@ module WPScan
         'Update required, you can not run a scan if a database file is missing.'
       end
     end
+
+    class ChecksumsMismatch < Standard
+      attr_reader :db_file
+
+      def initialize(db_file)
+        @db_file = db_file
+      end
+
+      def to_s
+        "#{db_file}: checksums do not match. Please try again in a few minutes."
+      end
+    end
   end
 end