OpenRCT2 does not provide a simple function to pause a server
while no client is connected. This patch adds a so called
"pause_server_if_no_clients" flag within network section of
config.ini. By default this flag is set to false to be backward
compatible with running servers. After setting this flag to
true the game is paused on launch and gets unpaused on first
connection.
Signed-off-by: Tobias Kohlbau <tobias@kohlbau.de>