增加针对Linux平台的一些TCP参数

[jeremyhi]

`

public static final JOption<Boolean> SO_REUSEPORT = valueOf("SO_REUSEPORT");

public static final JOption<Boolean> TCP_CORK = valueOf("TCP_CORK");

public static final JOption<Long> TCP_NOTSENT_LOWAT = valueOf("TCP_NOTSENT_LOWAT");

public static final JOption<Integer> TCP_KEEPIDLE = valueOf("TCP_KEEPIDLE");

public static final JOption<Integer> TCP_KEEPINTVL = valueOf("TCP_KEEPINTVL");

public static final JOption<Integer> TCP_KEEPCNT = valueOf("TCP_KEEPCNT");

public static final JOption<Integer> TCP_USER_TIMEOUT = valueOf("TCP_USER_TIMEOUT");

public static final JOption<Boolean> IP_FREEBIND = valueOf("IP_FREEBIND");

public static final JOption<Boolean> IP_TRANSPARENT = valueOf("IP_TRANSPARENT");

public static final JOption<Integer> TCP_FASTOPEN = valueOf("TCP_FASTOPEN");

public static final JOption<Boolean> TCP_FASTOPEN_CONNECT = valueOf("TCP_FASTOPEN_CONNECT");

public static final JOption<Integer> TCP_DEFER_ACCEPT = valueOf("TCP_DEFER_ACCEPT");`