[spaced4ndy]

A single command that fits the client's size check but not an encrypted transport block now fails on its own, and the session keeps working.

Transport

• tPutBlock pads the block before it takes the next send key from the chain, and takes it only for a block that fits. Every block that fits is encrypted to the same bytes as before.
• Server responses use the same function, so they get the same behaviour.

Tests

• testLargeCommand ("Short links"): on one client session, LSET with the largest user data that fits an encrypted block succeeds, one byte more returns TELargeMsg, and a following LGET on the same session returns the stored data.

Short links