Add weakTSH to Token Issuer

[tequdev]

For transactions with an issued token associated, the issuer of that token should be set as at least weakTSH.

Like Payment transaction between third parties with IOU, CheckCash with IOU etc...

Perhaps need to add to this process not only the account whose balance has changed, but also the account of the issuer of the token.

https://github.com/Xahau/xahaud/blob/dev/src/ripple/app/tx/impl/Transactor.cpp#L1447-L1472

[dangell7]

Interesting idea. Keep them coming!

[tequdev]

This would allow Token issuers to track holder balances and manage RewardLgrFirst, RewardLgrLast, RewardTime, and RewardAccumulator in a each Hook.