contrib: add win32 credential-helper

Since the Windows port of Git expects binary pipes, we need to make
sure the helper-end also sets up binary pipes.

Side-step CRLF-issue in test to make it pass.

Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com>

compat/terminal: support echoing on windows

Without /dev/tty support, git_terminal_prompt simply ignores the
'echo'-parameter. On Windows we can do better by clevering up our
getpass-implementation a bit so it can conditionally echo.

While we're at it, plug a small memory-leak by returning a pointer
to a static strbuf instead of detaching it. This is the same thing
the /dev/tty-version of git_terminal_prompt does, and the callee
doesn't expect to have to free it's memory.

Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com>

contrib: add win32 credential-helper

Since the Windows port of Git expects binary pipes, we need to make
sure the helper-end also sets up binary pipes.

Side-step CRLF-issue in test to make it pass.

Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com>

add lame win32 credential-helper

Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com>

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