fixed to initialize sockaddr_in6 by zero
fixed to initialize sockaddr_in6 by zero

Some environment has field of sin6_scope_id inside sockaddr_in6
and it should be set to zero.

sartura/libwebsockets,dumganhar/libwebsockets,ralight/libwebsockets,SoapyMan/libwebsockets,sartura/libwebsockets,dumganhar/libwebsockets,dumganhar/libwebsockets,ralight/libwebsockets,SoapyMan/libwebsockets,SoapyMan/libwebsockets,sartura/libwebsockets,dumganhar/libwebsockets,ralight/libwebsockets,ralight/libwebsockets,sartura/libwebsockets,dumganhar/libwebsockets,SoapyMan/libwebsockets,ralight/libwebsockets,sartura/libwebsockets,SoapyMan/libwebsockets,sartura/libwebsockets,sartura/libwebsockets