* agent: notify about polled message processing (for iOS notifications)
* optionally keep key and support re-opening database
* exports
* test that cannot reopen when created with keepKey: false
* set max number of messages to receive for a notification to 3
* agent schema/methods/types/store methods for notifications tokens
* register notification token on the server
* agent commands for notification tokens
* refactor initial servers from AgentConfig
* agent store functions for notification tokens
* server STM store methods for tokens
* fix protocol client for ntfs (use generic handshake), minimal server and agent tests
* server command to verify ntf token
* make KeyHash non-optional, StrEncoding class
* change server URI format in agent config, refactor with StrEncoding
* refactor Crypto using checkAlgorithm
* refactor parsing connection requests
* prepare to validate CA fingerprint sent in client handshake
* KeyHash check in handshake
* rename type to CliCommand
* server validates keyhash sent by the client
* validate -a option when parsing
* more of StrEncoding
* example websockets server
* example of ws client
* type class TConnection for generic TCP/WebSockets implementation
* support WebSockets transport
* rename TConnection methods
* revert runClient to not need transport arg
* pass the list of ports and transports via SMP server config
* remove TypeApplications
* s/Transport/TProxy/, s/TConnection/Transport/
* fix server with multiple transports, make SMP client use WS transport with port 80 (TODO fallback to WS)
* move SMP server from agent commands NEW/JOIN to agent config
* fix SMPServer parser
* update agent protocol - server management
* enable agent test
* agent test with 2 servers
* create reply queue on the configured server
* choose random server
* swap bind
* generate key pair
* crypto: sign/verify functions
* remove extension
* parse/serialize keys
* use RSA recipient/sender keys (TODO sign/verify)
* make PublicKey newtype, assign 0s to private_p & private_q
* replace SMP command parsing with Attoparsec
* rename types: Signed->Transmission, Transmission->SignedTransmission
* sign and verify commands (server tests skipped, agent tests pass)
* SMP client: avoid seralizing transmission twice when sending commands
* update SMP server tests to use command signatures
* remove support for "SEND :msg" syntax from SMP server protocol
* rename RSA module name to R to avoid confusion with C used for S.M.Crypto
* update key sizes to use bits `div` 8
* tidy up
