Drop -q in ssh-log-wrapper.sh to preserve logs.

scp and sftp like to add -q to the command line passed to ssh which
overrides the LogLevel we set in the config files and suppresses output
to the deb

Drop -q in ssh-log-wrapper.sh to preserve logs.

scp and sftp like to add -q to the command line passed to ssh which
overrides the LogLevel we set in the config files and suppresses output
to the debug logs so drop any "-q" from the invoked ssh. In the one
case where we actually want to use -q in the banner test, call the ssh
binary directly bypassing the logging wrapper.

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eliminate explicit specification of protocol in tests and loops over
protocol. We only support SSHv2 now.

Test missing banner file, suppression of banner with ssh -q, check return
code from ssh. ok markus@

Test SSH2 banner. ok markus@