Why is SO_LINGER set by default ?

[syborg64]

in posix os_socket_bind

    struct linger ling;
    ling.l_onoff = 1;
    ling.l_linger = 0;
    ret = setsockopt(socket, SOL_SOCKET, SO_LINGER, &ling, sizeof(ling));
    if (ret < 0) {
        goto fail;
    }

Linger is set to 0 immediately after any bind.
I couldn't find any references to it, in blames or in the github.
This means closing any connection fails with a reset ? why is that set ?