- Bot now takes shard id (optional) and total shards (optional) command line arguments (changed from shard id and parent process id)

- Sharding with coordinator now works properly
- Documented creds.yml RestartCommand - it has no effect when coordinator is starting the bot
- Regenerated creds_example.yml
- Removed all db migrators as the v3 requires the user to have updated 2.x all the way
- TotalShards in creds.yml gets overriden by coord.yml's TotalShards if the bot is ran through coordinator (more precisely, by the command line argument to the bot)
- Coordinator now runs on http://localhost:3442 by default, you can change this in appsettings.json
    - This is done because of macos https issues
    - Primarily because https for regular users is a massive hassle. Coordinator shouldn't be exposed anyway
- Minor cleanup

src/NadekoBot.Coordinator/Services/CoordinatorRunner.cs

@@ -79,7 +79,7 @@ namespace NadekoBot.Coordinator
 
         protected override async Task ExecuteAsync(CancellationToken stoppingToken)
         {
-            Log.Information("Executing");
+            // Log.Information("Executing");
 
             bool first = true;
             while (!stoppingToken.IsCancellationRequested)
@@ -98,7 +98,7 @@ namespace NadekoBot.Coordinator
                         
                         if (first)
                         {
-                            Log.Information("Startup order: {StartupOrder}",string.Join(' ', shardIds));
+                            // Log.Information("Startup order: {StartupOrder}",string.Join(' ', shardIds));
                             first = false;
                         }
                         
@@ -192,7 +192,7 @@ namespace NadekoBot.Coordinator
                 FileName = _config.ShardStartCommand,
                 Arguments = string.Format(_config.ShardStartArgs,
                     shardId,
-                    Environment.ProcessId),
+                    _config.TotalShards),
                 EnvironmentVariables =
                 {
                     {"NADEKOBOT_IS_COORDINATED", "1"}