libtls-bearssl 0.4

Changes

• tls_close() no longer waits for peer's close_notify. Some servers
  do not send their own close, resulting in a hang if they do not
  close the connection.
• Merge changes from libressl 3.3.3.

Bug fixes

• Pass NULL to br_x509_minimal start_chain when client didn't use
  SNI instead of the empty string to avoid relying on undocumented
  BearSSL behavior.
• Save SNI name in ctx->servername on server side so that applications
  can determine which name the client connected to.
• Fix a few error messages printing errno unintentionally.