[Swan-commit] Changes to ref refs/heads/main

[Andrew Cagney]

New commits:
commit e29d02bb995d5d05f8fdda37e2d76593efea5e3a
Author: Andrew Cagney <cagney at gnu.org>
Date:   Fri Jun 25 19:51:22 2021 -0400

    packets: eliminat same_pbs_out_as_chunk()
    
    Pass a read-only shunk down to the renamed send_shunks().
    
    Speaking of which: the message header should include the 0 SPI prefix
    so that send_chunks() can skip it (instead of a copy to stack to add
    it), and the two chunks should be passed to write as iovs.