ubusd does not forward data

[lanhtao]

I found that when ubusd receives incomplete data, cl ->pending-mgs_offset is always non-zero, and subsequent requests corresponding to this ubusd service will not respond (due to problems with packet parsing headers). Shouldn't a fault tolerance mechanism be added to the client_cb function to reset cl ->pending-mgs_offset when the packet is incomplete. Can anyone help solve it? @nbd168 ，Did you solve a similar problem recently.I see that your recent submissions are somewhat related to this, but it's a problem with the sender, and mine is a problem with the receiver