minor documentation updates

Neither 30 nor 5 is correct :(. There is a bug in the code:
```cpp
void masterconn_reload(void) {
  (...)
  ReconnectionDelay = cfg_getuint32("MASTER_RECONNECTION_DELAY",5);
  (...)
}

void masterconn_init(void) {
  (...)
  ReconnectionDelay = cfg_getuint32("MASTER_RECONNECTION_DELAY", 1);
  (...)
}
```
So the default is 1 second until the firs reload, 5 second after. :-1: Our intention was to set it to 1 second...