-Removes the unique constraint on the 'addr' field from the masternode collection
NOTE: If you are experiencing a mongo duplicate key error while running a masternode sync, the easiest way to correct the problem is as follows:
1) #Stop the explorer
2) git pull
3) mongo
4) use explorerdb
5) db.masternodes.drop()
6) exit
7) #Restart the explorer
8) /path/to/explorer/scripts/sync.sh /path/to/node masternodes
-Automatically detect if using newer or older Dash masternode format and display applicable columns and data
-Added new fields 'ip_address' and 'last_paid_block' to the Masternode collection
-Replace tabs with double-spaces
-Betting spacing and lining up of code functions
-Add missing semi-colons
-Remove extra characters and spaces where applicable
-Remove commented-out code fragments
-Add missing 2021 date to LICENSE
-Small touchups and other misc nitpickings
-Added a new "Masternodes" page which displays the current list of masternodes on the network
-/api/getmasternodelist is no longer publicly accessible and has been replaced by /ext/getmasternodelist which returns the masternode list from local collection instead of directly from wallet
-Added new masternode sync options to sync.js and sync.sh
-Added new masternodes_last_updated field to the Stats collection
-Updated delete_database.sh and restore_backup.sh to include support for the new masternodes collection
-Network header menu icon changed to allow the new Masternodes menu item to use the old network icon
joeuhren