v0.5.0

Scenario API and interface-process behaviours modelled on
hm-simulator by Sebastian
Raff (MIT) — thanks for documenting what rfd and hmipserver actually
answer. Every behaviour below that concerns the CCU comes from that
documentation and was not measured for godevccu; DOCUMENTATION.md
lists the source of each.

Added

• Fault injection: VirtualCCU.InjectFault(iface, FaultRule) makes
  the next calls of a method answer a fault, answer late, never answer,
  or close the connection — on XML-RPC, its TLS twin and BIN-RPC alike;
  ClearFaults drops the rules and releases held calls.
• Interface restarts: DropConnection, StopInterface,
  StartInterface(iface, forgetClients) and RestartInterface stop an
  interface process (its port refuses connections) and bring it back on
  the same port, forgetting its clients or calling them back
  (system.listMethods on BidCos, then listDevices).
• Introspection: WriteLog (every client setValue/putParamset
  over XML-RPC, BIN-RPC and JSON-RPC, with rejected parameters and the
  fault) and CallbackLog (every call to a client with sent/answered
  time), ConfigPending, PoisonedChannels, Ports.
• Control port: VirtualCCU.ControlHandler() serves the scenario
  API as POST /scenario/<call>; the CLI exposes it with
  -control-port. -ports-json <file|-> writes the bound ports once
  every server listens; port 0 now lets the system pick; -realism
  and -interfaces Name=port,… reach the realism preset and the
  separate interface listeners from the command line.
• Realism fields: InitSemantics (init keyed by exact url,
  deleteDevices before newDevices, VERSION diff, HmIP resend),
  MasterModel (rfd's and hmipserver's MASTER write models with sticky
  and queued CONFIG_PENDING and poisoned channels), InterfaceQuirks
  (no PONG from hmipserver, derived getServiceMessages with rfd's
  "", SENDER_BROKEN on rfd's unfiltered getLinks, rfd's metadata
  faults) — all three part of RealismCCU() — and
  ServiceMessagesFault, which stays out of the preset.

Fixed

• Re-registering or removing a client now stops its batched-event
  dispatcher; before, a client re-registered under the same interface id
  with a new url kept receiving batched events at the old url.

Changed

• Persisted init registrations (PersistInit) are written as a list of
  {interface_id, url}; the earlier map format is still read.
• The Realism.FaultCodes doc comment listed codes that did not match
  internal/ccu/faults.go; it now names −2/−3/−5 as implemented.