patch 9.0.1583: get E304 when using 'cryptmethod' "xchacha20v2" Commit: https://github.com/vim/vim/commit/3a2a60ce4a8e73594bca16814672fcc243d093ac Author: Bram Moolenaar <Bram@vim.org> Date: Sat May 27 18:02:55 2023 +0100 patch 9.0.1583: get E304 when using 'cryptmethod' "xchacha20v2" Problem: Get E304 when using 'cryptmethod' "xchacha20v2". (Steve Mynott) Solution: Add 4th crypt method to block zero ID check. Avoid syncing a swap file before reading the file. (closes #12433)

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