Setup conn with authentication directives. This is not necessary for
methods #GST_RTSP_AUTH_NONE and #GST_RTSP_AUTH_BASIC. For
#GST_RTSP_AUTH_DIGEST, directives should be taken from the digest challenge
in the WWW-Authenticate response header and can include realm, domain,
nonce, opaque, stale, algorithm, qop as per RFC2617.
Setup conn with authentication directives. This is not necessary for methods #GST_RTSP_AUTH_NONE and #GST_RTSP_AUTH_BASIC. For #GST_RTSP_AUTH_DIGEST, directives should be taken from the digest challenge in the WWW-Authenticate response header and can include realm, domain, nonce, opaque, stale, algorithm, qop as per RFC2617.