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This adds support for sloppy TCP and SCTP modes to IPVS. When enabled (sysctls net.ipv4.vs.sloppy_tcp and net.ipv4.vs.sloppy_sctp), allows IPVS to create connection state on any packet, not just a TCP SYN (or SCTP INIT). This allows connections to fail over from one IPVS director to another mid-flight. Signed-off-by: Alexander Frolkin <avf@eldamar.org.uk> Signed-off-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: Simon Horman <horms@verge.net.au>