message: Allow non wipe if mongodb-block-start specified
diff: @@ -1023,7 +1023,7 @@ void mongo_db_plugin::plugin_initialize(const variables_map& options)
  if( options.at( "mongodb-wipe" ).as<bool>()) {
  ilog( "Wiping mongo database on startup" );
  my->wipe_database_on_startup = true;
  - } else {
  + } else if( options.count( "mongodb-block-start" ) == 0 ) {
  FC_ASSERT( false, "--mongodb-wipe required with --replay-blockchain, --hard-replay-blockchain, or --delete-all-blocks"
  " --mongodb-wipe will remove all EOS collections from mongodb." );
  }
  