git_security_fix.mdwn

git had some remotely exploitable security holes announced recently
(CVE-2016-2324, CVE-2016-2315)

git-annex builds that bundle git need to be updated.

status of autobuilds:

* Linux is fixed (all builds)
* OSX pending (host is moving)
* Windows waiting on updated release of git for Windows
* Android is fixed (git build is untested)

status of released builds:

* Linux is fixed (all builds)
* OSX is vulnerable
* Windows is vulnerable
* Android is fixed (git build is untested)