Chunk every guild if it's a user bot.
Chunk every guild if it's a user bot.

This also increases the timeout for chunking by 30 seconds for every
chunk we're waiting for.

rapptz/discord.py,Harmon758/discord.py,Rapptz/discord.py,Harmon758/discord.py,mgardne8/discord.py,khazhyk/discord.py,imayhaveborkedit/discord.py,variablehair/Eggplantato