proxy_command_fails_on_Windows.mdwn

### Please describe the problem.

The new ''git annex proxy'' command fails every call in the 2014-11-28 daily Windows build.

### What steps will reproduce the problem?

1) Install daily Windows build via https://downloads.kitenet.net/git-annex/autobuild/windows/.

2) Run, in git bash:

    $ git annex proxy -- pull
    git-annex: pull: createProcess: does not exist (No such file or directory)
    failed
    git-annex: proxy: 1 failed

### What version of git-annex are you using? On what operating system?

Daily Windows build 5.20141128-g70f997e on Windows 7 x64

### Please provide any additional information below.

    $ git annex version
    git-annex version: 5.20141128-g70f997e
    build flags: Assistant Webapp Webapp-secure Pairing Testsuite S3 WebDAV DNS Feed
    s Quvi TDFA CryptoHash
    key/value backends: SHA256E SHA1E SHA512E SHA224E SHA384E SKEIN256E SKEIN512E SH
    A256 SHA1 SHA512 SHA224 SHA384 SKEIN256 SKEIN512 WORM URL
    remote types: git gcrypt S3 bup directory rsync web webdav tahoe glacier ddar ho
    ok external
    local repository version: 5
    supported repository version: 5
    upgrade supported from repository versions: 2 3 4

> Seems the man page was mis-read, or possibly I've fixed it,
> since it certianly says you need to specify "-- git cmd", not
> just "-- cmd". [[done]] --[[Joey]]