- 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/Modules/Xp/Services/XpConfigMigrator.cs

@@ -1,70 +0,0 @@
-using System;
-using System.Data.Common;
-using Microsoft.EntityFrameworkCore;
-using NadekoBot.Services;
-using Serilog;
-
-namespace NadekoBot.Modules.Xp.Services
-{
-    public sealed class XpConfigMigrator : IConfigMigrator
-    {
-        private readonly DbService _db;
-        private readonly XpConfigService _gss;
-
-        public XpConfigMigrator(DbService dbService, XpConfigService gss)
-        {
-            _db = dbService;
-            _gss = gss;
-        }
-
-        public void EnsureMigrated()
-        {
-            using var uow = _db.GetDbContext();
-            using var conn = uow.Database.GetDbConnection();
-            Migrate(conn);
-        }
-
-        private void Migrate(DbConnection conn)
-        {
-            using (var checkTableCommand = conn.CreateCommand())
-            {
-                // make sure table still exists
-                checkTableCommand.CommandText =
-                    "SELECT name FROM sqlite_master WHERE type='table' AND name='BotConfig';";
-                var checkReader = checkTableCommand.ExecuteReader();
-                if (!checkReader.HasRows)
-                    return;
-            }
-
-            using (var checkMigratedCommand = conn.CreateCommand())
-            {
-                checkMigratedCommand.CommandText =
-                    "UPDATE BotConfig SET HasMigratedXpSettings = 1 WHERE HasMigratedXpSettings = 0;";
-                var changedRows = checkMigratedCommand.ExecuteNonQuery();
-                if (changedRows == 0)
-                    return;
-            }
-
-            Log.Information("Migrating Xp settings...");
-
-            using var com = conn.CreateCommand();
-            com.CommandText = $@"SELECT XpPerMessage, XpMinutesTimeout, VoiceXpPerMinute, MaxXpMinutes 
-FROM BotConfig";
-
-            using var reader = com.ExecuteReader();
-            if (!reader.Read())
-                return;
-
-            _gss.ModifyConfig(ModifyAction(reader));
-        }
-
-        private static Action<XpConfig> ModifyAction(DbDataReader reader)
-            => config =>
-            {
-                config.XpPerMessage = (int) (long) reader["XpPerMessage"];
-                config.MessageXpCooldown = (int) (long) reader["XpMinutesTimeout"];
-                config.VoiceMaxMinutes = (int) (long) reader["MaxXpMinutes"];
-                config.VoiceXpPerMinute = (double) reader["VoiceXpPerMinute"];
-            };
-    }
-}