struct *linger* is missing

[sateffen]

Hey,

the linger {int l_onoff, int l_linger} struct is missing in this binding. I checked it's implementation in glibc and musl, but it's missing in this binding.

I guess the struct should look like in the crate winapi.

[alexcrichton]

Ah yeah should be good to add at any time!

[sateffen]

Ok, it's a bad idea to take the struct from winapi, because on windows you need to set u_short's, on *nix systems you need to set int's, so we need to set it so c_int, not u16.

[alexcrichton]

Now fixed!