make the value configurable

src/main/java/com/jagrosh/jmusicbot/BotConfig.java

@@ -43,7 +43,7 @@ public class BotConfig
             successEmoji, warningEmoji, errorEmoji, loadingEmoji, searchingEmoji,
             evalEngine;
     private boolean stayInChannel, songInGame, npImages, updatealerts, useEval, dbots;
-    private long owner, maxSeconds, aloneTimeUntilStop;
+    private long owner, maxSeconds, aloneTimeUntilStop, maxYTPlaylistPages;
     private double skipratio;
     private OnlineStatus status;
     private Activity game;
@@ -91,6 +91,7 @@ public void load()
             useEval = config.getBoolean("eval");
             evalEngine = config.getString("evalengine");
             maxSeconds = config.getLong("maxtime");
+            maxYTPlaylistPages = config.getLong("maxytplaylistpages");
             aloneTimeUntilStop = config.getLong("alonetimeuntilstop");
             playlistsFolder = config.getString("playlistsfolder");
             aliases = config.getConfig("aliases");
@@ -341,6 +342,11 @@ public long getMaxSeconds()
         return maxSeconds;
     }
 
+    public long getMaxYTPlaylistPages()
+    {
+        return maxYTPlaylistPages;
+    }
+
     public String getMaxTime()
     {
         return TimeUtil.formatTime(maxSeconds * 1000);

src/main/java/com/jagrosh/jmusicbot/audio/PlayerManager.java

@@ -63,7 +63,7 @@ public void init()
         AudioSourceManagers.registerLocalSource(this);
 
         DuncteBotSources.registerAll(this, "en-US");
-        source(YoutubeAudioSourceManager.class).setPlaylistPageCount(50);
+        source(YoutubeAudioSourceManager.class).setPlaylistPageCount((int)bot.getConfig().getMaxYTPlaylistPages());
     }
 
     public Bot getBot()

src/main/java/com/jagrosh/jmusicbot/audio/TransformativeAudioSourceManager.java

@@ -16,10 +16,10 @@
 package com.jagrosh.jmusicbot.audio;
 
 import com.sedmelluq.discord.lavaplayer.player.AudioPlayerManager;
-import com.sedmelluq.discord.lavaplayer.source.youtube.YoutubeAudioSourceManager;
 import com.sedmelluq.discord.lavaplayer.track.AudioItem;
 import com.sedmelluq.discord.lavaplayer.track.AudioReference;
 import com.typesafe.config.Config;
+import dev.lavalink.youtube.YoutubeAudioSourceManager;
 import java.io.IOException;
 import java.util.Collections;
 import java.util.List;

src/main/resources/reference.conf

@@ -98,6 +98,15 @@ stayinchannel = false
 
 maxtime = 0
 
+// This sets the maximum number of pages of songs that can be loaded from a YouTube
+// playlist. Each page can contain up to 100 tracks. Playing a playlist with more
+// pages than the maximum will stop loading after the provided number of pages.
+// For example, if the max was set to 15 and a playlist contained 1850 tracks,
+// only the first 1500 tracks (15 pages) would be loaded. By default, this is
+// set to 10 pages (1000 tracks).
+
+maxytplaylistpages = 10
+
 
 // This sets the ratio of users that must vote to skip the currently playing song.
 // Guild owners can define their own skip ratios, but this will be used if a guild