The details are in my latest blog post: https://dlang.org/blog/2019/06/23/dconf-t-shirts-and-the-human-resource-fund/
Follow the instructions there to make a $60 donation to the HR fund and receive a DConf 2019 t-shirt. DMan t-shirts and DConf 2020 discounts are also available for larger donations.
But please note, the DConf 2019 shirts are only available through the link in the blog post, not from the link on the dlang.org donation page. Again, please read the blog post for the details.
As I mentioned during the AGM at DConf, the HR fund is of critical importance right now. We need to grow it as much as possible in order to hire folks to do the difficult work that we can't get done on the cheap.
