get_negotiable_mechs
ret = get_negotiable_mechs(minor_status, sc, spcred, GSS_C_ACCEPT);
ret = get_negotiable_mechs(minor_status, sc, spcred, GSS_C_ACCEPT);
ret = get_negotiable_mechs(minor_status, sc, spcred, GSS_C_INITIATE);
static OM_uint32 get_negotiable_mechs(OM_uint32 *, spnego_gss_ctx_id_t,