[PULL 15/16] multifd: Send header packet without flags if zero-copy-send is enabled

From: Leonardo Bras Since d48c3a0445 ("multifd: Use a single writev on the send side"), sending the header packet and the memory pages happens in the same writev, which can potentially make the migration faster. Using channel-socket as example, this works well with the default copying mechanism

[PULL 15/16] multifd: Send header packet without flags if zero-copy-send is enabled

From: Leonardo Bras Since d48c3a0445 ("multifd: Use a single writev on the send side"), sending the header packet and the memory pages happens in the same writev, which can potentially make the migration faster. Using channel-socket as example, this works well with the default copying mechanism