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Don't check CmdSN for initial login request.

Description

Don't check CmdSN for initial login request.

This fixes connection errors for some initiators not starting CmdSN
from zero.

While there, fix wrong status details reported for couple errors.

MFC after: 3 days

Details

Provenance
mavAuthored on
Parents
rS295561: POSIX states that #include <signal.h> shall make both mcontext_t and
Branches
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