lastidnotfound step 2:
* move "record stage", aka poh_service into banking stage
* remove Entry.has_more, is incompatible with leader rotation
* rewrite entry_next_hash in terms of Poh
* simplify and unify transaction hashing (no embedded nulls)
* register_last_entry from banking stage, fixes#1171 (w00t!)
* new PoH doesn't generate empty ledger entries, so some fixes necessary in
multinode tests that rely on that (e.g. giving validators airdrops)
* make window repair less patient, if we've been waiting for an answer,
don't be shy about most recent blobs
* delete recorder and record stage
* make more verbost thin_client error reporting
* more tracing in window (sigh)
* Add hooks for executing the storage contract
* Add store_ledger stage
Similar to replicate_stage but no voting/banking stuff, just convert
blobs to entries and write the ledger out
* Add storage_addr to tests and add new NodeInfo constructor
to reduce duplication...
* Move recycler instances to the point of allocation
* sinks no longer need to call `recycle`
* Remove the recycler arguments from all the apis that no longer need them
* budget and system contracts and verification
* contract check_id methods
* system call contract
* verify contract execution rules
* move system into its own file
* allocate before transfer for budget
* store error in budget context
* budget contract and tests without bank
* moved budget of of bank
* Implemented recvmmsg() for UDP packets
- This change implements binding between libc API for recvmmsg()
- The function can receive multiple packets using one system call
Fixes#1141
* Added unit tests for recvmmsg()
* Added recv_mmsg() wrapper for non Linux OS
* Address review comments for recvmmsg()
* Remove unnecessary imports
* Moved target specific dependencies to the function
* fix poll_gossip_for_leader() loop to actually wait
for 30 seconds
* reduce reuseaddr use to only when necessary,
try to avoid already bound sockets
* move nat.rs to netutil.rs
* add gossip tracing to thin_client and bench-tps
* Reuse UDP port and open multiple sockets for transaction address
* Fixed failing crdt tests
* Add tests for reusing UDP ports
* Address review comments
* Updated bench-streamer to use multiple receive sockets
* Fix minimum number of recv sockets for bench-streamer
* Address review comments
Fixes#1132
* Moved bind_to function to nat.rs
