Fix error handling doc for CTcpServer::Stop

This function can throw
CAdapterFactory: don't accept new connections when stopping
CBroker: synchronize access to m_timings

* Boolean writes are not guaranteed to be atomic. E.g. the value may
  be stored half in one word, half in another in memory, depending on
  architecture.

* A memory barrier is required to ensure the other thread sees the
  updated value.  The mutex takes care of this.
CAdapterFactory: add missing function to top-of-file list
testing: lower CPnpAdapter verbosity
DEV_PNP_TIMEOUT should *really* be milliseconds

Missed a spot