entermix

server {
    listen              80;
    server_name www.domain.com domain.com;
    return 301 https://domain.com$request_uri ;
}
server {
    listen              80;
    server_name www.domain.ru domain.ru;
    return 301 https://domain.ru$request_uri ;
}
server {
    listen              443 ssl;
    server_name www.domain.ru;
    return 301 https://domain.ru$request_uri ;
}
server {
    listen              443 ssl;
    server_name www.domain.com;
    return 301 https://domain.com$request_uri ;
}
server {
    listen              443 ssl;
    server_name domain.ru domain.com;
    # основная секция
}