Gratipay: strengthen Diffie-Hellman (DH) key exchange parameters in grtp.co

Hi, server supports weak Diffie-Hellman DH key exchange parameters in grtp.co Poc:https://www.ssllabs.com/ssltest/analyze.html?d=grtp.co more description about weak Diffie-Hellman DH key exchange parameters https://weakdh.org/...