Create a socket to provide the service for Plug widget.
@in svcname: free(string, free);
@in svcnum: int;
@in svcsys: bool;
svcname (in) - The name of the service to be advertised. Ensure that it is unique (when combined with
svcnum) otherwise creation may fail.
svcnum (in) - A number (any value, 0 being the common default) to differentiate multiple instances of services with the same name.
svcsys (in) - A boolean which when true specifies the creation of a system-wide service to which all users can connect, otherwise the service is private to the user id that created it.