failures when using OpenSSH 2.9.9 or SunSSH

later to accept 'none' as an indication to disable connection multiplexing

 ConnectTimeout
 ForwardX11Trusted
 HashKnownHosts
 RekeyLimit
 ServerAliveCountMax
 ServerAliveInterval

- Capability of running socks5 tests must be based on ssh daemon version
  and not on ssh client version.

requires a non blank argument.

SCP, SFTP and SOCKS4 tests is now OpenSSH 2.9.9 or SunSSH 1.0

For SOCKS5 tests minimum versions are OpenSSH 3.7 or SunSSH 1.0

(http://curl.haxx.se/bug/view.cgi?id=1850730) I wrote up test case 552. The
test is doing a 70K POST with a read callback and an ioctl callback over a
proxy requiring Digest auth. The test case code is more or less identical to
the test recipe code provided by Spacen Jasset (who submitted the bug report).

components doesn't have read permission set.

directory components doesn't have read permission set.

A failed attempt to repeat bug report #1850730 (ie the test works fine).

callback) over a proxy when NTLM is used as auth with the proxy. The bug
also concerned Digest and was limited to using callback only. Spacen worked
with us to provide a useful patch. I added the test case 547 and 548 to
verify two variations of POST over proxy with NTLM.

is supposed to repeat the bug report "NTLM proxy authentication with
CURLOPT_READDATA seems broken." posted on the curl-library mailing list on dec
3 2007.

present when enabled by on option which isn't done by default (and isn't even
available for the curl app atm)

Cleanup some debugging messages. Unlink log file on exit.

the socks server port in the test suite. This is the default setting
unless a tinkered built ssh is being used.

port forwarding, our socks port, prevents ssh from running on some systems.

By default, ssh binds local port forwardings to the loopback address, since this
was the address being given as the explicit bind address, now it isn't given.

of test suite ssh and socks servers.

when builddir is different from srcdir.