Java Edition 1.17 Release Candidate 1

1.17 Release Candidate 1 (known as 1.17-rc1 in the launcher) is the first release candidate for Java Edition 1.17, released on June 4, 2021, which fixes bugs and crashes.

Fixes

 * Other
 * Improved desync issues when exiting a boat over a high latency connection.
 * Fixed crashes.