## IPSet

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A library wrapper for `libipset`.  
Support the following options:

* sorted -> ```EnvOption::Sorted```
* exist -> ```EnvOption::Exist```
* quiet -> ```EnvOption::Quiet```
* resolve -> ```EnvOption::Resolve```
* name -> ```EnvOption::ListSetName```
* terse -> ```EnvOption::ListHeader```

Support the following commands:

* add
* del
* test
* create
* list
* destroy
* flush
* save
* restore

Support the following type:

* BitmapIp
* BitmapIpMac
* BitmapPort
* HashIp
* HashIpMac
* HashIpMark
* HashIpPort
* HashIpPortIp
* HashIpPortNet
* HashMac
* HashNet
* HashNetIface
* HashNetNet
* HashNetPort
* HashNetPortNet
* ListSet,

### Example

  ```rust
use std::net::IpAddr;

use ipset::{Error, HashIp, IPSet, Session};

fn main() -> Result<(), Error> {
    let mut session: Session<HashIp> = Session::<HashIp>::new("test".to_string());
    let ip: IpAddr = "192.168.3.1".parse().unwrap();
    session.create(|builder| builder.with_ipv6(false)?.build())?;

    let ret = session.add(ip, &[])?;
    println!("add {}", ret);

    let exists = session.test(ip)?;
    println!("test {}", exists);

    let ips = session.list()?;
    for ip in ips {
        println!("list {}", ip);
    }

    let ret = session.save("test.ipset".into())?;
    println!("save {}", ret);

    let ret = session.del(ip)?;
    println!("del {}", ret);

    let ret = session.flush()?;
    println!("flush {}", ret);

    let ret = session.destroy()?;
    println!("destroy {}", ret);

    let set = IPSet::new();
    set.restore("test.ipset")?;

    Ok(())
}
```