Adopted the nanoseconds timeout precision
- in config file added support for ns, us, ms, s timeout precision (without indication, it uses `seconds` precision).
Warning: as there is no concurrent request handling in single threaded mode,
it is recommended to either set the keep_alive_timeout to a small value,
or disable persistent connection by setting max_keep_alive_requests to 0.
Change the default keep_alive_timeout from 15 to 5 seconds.
Accept -1 as value of max_keep_alive_requests to have unlimited number of request in the same persistent connection.
Provided easy way to set secure settings for Standalone.
For wsf launcher boolean option accept "true" or "yes" for True boolean, anything else is False.
