Get an available port
```rust use get_port;
fn main() { let anavailableport = getport::getport().unwrap(); // Returns the first available port in default range let anavailableportinrange = getport::getportinrange(get_port::PortRange { min: 5000, max: 6000 }).unwrap(); // Returns the first available port in speciefied range
// ...
} ```
get_port_prefered
, used to supply (a list of) prefered port(s)get_port_except
to exclude certain port(s)