* Merged FluxCP revisions 1126-1131 by [Paradox924X]

Updated IPN code to comply with changes being implemented Feb 1, 2013. https://www.x.com/node/320404 (1126, 1131)

Fixed reference to invalid constant PASSWORD_HAS_USERNAME in place of USERNAME_IN_PASSWORD. (1127)

Prevented issues when attempting to use number_format() on a null value returned
for guild tax and guild member devotion where a record does not exist in the guild_position table. (1128,1130)

Removed unnecessary and broken ban lookup and type check prior to temporarily or
permanently banning an account. (1129)