Should gear consider reply message as outgoing message?

[grishasobol]

As you know we have two runtime constants, which supposed to limit max amount of outgoing messages during one message and max amount of bytes in outgoing messages during one execution.

The question is whether we should consider reply as outgoing message and so take it in account in this limits.

Some differences for example if take in account reply:

• In handle, init messages we must subtract one message from OutgoingLimit counter always, cause handle messages always sent one reply, no matter what is result of execution.
• In handle_reply, handle_signal messages should not subtract, because handle_reply and handle_signal does not send reply, so in this cases user can send one additional message in comparison with handle and init.
• Also reply bytes will be taken in account, so

bytes counter == outgoing messages bytes + reply message bytes amount

see also #3784