Added a new command line option to citserver "-s" takes a numerical parameter.

Added a new command line option to citserver "-s" takes a numerical parameter.
When this is specified with a number greater than 0 the server will start
almost as normal except it will not start any workers or module related
threads.
Instead it will create the specified number of simulation threads and time
how long it takes for them to be created, create a context, delete the
context and get cleaned up. A message is written to the log stating how long
it took and then the server will exit normally.

This is to help tune the client connection code and thread creation stuff.