* send "quota exceeded" message from SMP server when sender gets ERR QUOTA (ignored in the agent for now)
* send msg quota to the recipient to indicate that sender got ERR QUOTA, test
* switch between slow/fast retry intervals (tests do not pass yet)
* send QCONT message, refactor RetryInterval, test
* refactor
* remove comment
* remove space
* unit test for withRetryLock2
* refactor
* SMP v3: encrypt message timestamp and flags together with the body between server and recipient
* v3 tests
* update protocol doc
* add test for max size message
* delay in notifications test
* simplify v3
* encrypt server message to the recipient when sent
* refactor
* exit on error restoring the messages
* refactor, increase test timeout
* style
* add prints to the test
* remove error from unsafeMaxLenBS
* update protocol
* lint, improve test, change func param
* save and restore messages when server is restarted
* read file line by line
* add import
* optmize restoring messages by reading the whole file
* update version to 2.3.0
* update scripts
* add script
* update readme
* add msgId to ACK to avoid the risks of losing messages with concurrent delivery (in app/NSE)
* update ACK to only remove message and update stats if msgId matches
* add tests, fix
* rename sameMsgId/msgDeleted
* support stopping and resuming agent (#385)
* export agentDbPath
* support fully closing and resuming agent
* whitespace
* clean up
* support message flags visible to SMP server to control notifications (and for any future extensions)
* simplify message flags encoding
* GET command
* binary SMP protocol encoding (server tests fail)
* use 1 byte for bytestring length when encoding/decoding
* Encoding class, binary tags
* update server tests
* negotiate SMP version in client/server handshake
* add version columns to queues and connections
* split parsing SMP client commands and server responses to different functions
* check uniqueness of protocol tags
* split client commands and server responses/messages to separate types
* update types in SMP client
* remove pattern synonyms for SMP errors
* simplify getHandshake
* update SMP protocol encoding in protocol spec
* encode time as a number of seconds (64-bit integer) since epoch
