Make several timeout values configurable

Clients connection check retry timeout value (default 2000 ms) The time that owsd will wait before retrying a failed connection attempt to a client, this value is multiplied with the amount of failed attempt so far.

Timeout value on scanning all clients (default 3600000 ms <1h>) When this timer has expired, all clients will be added. This is to catch clients whos connect event was missed.

Set maximum connection check time on each client (default 10) The maximum amount of failed connection atemptes.