Add implicit cases to permission resolution in Channel.permissions_for
Add implicit cases to permission resolution in Channel.permissions_for

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