Feature Request: Support for cookie-based auth

[juliandkatz]

##As an alternative to typical SSH auth, we'd have use for authentication via a cookie file.

This engages the http.cookiefile option of git config.

More specifically, we'd like to do so in the context of the git-sync package, which sets the http.cookiefile via the command: (see line 679)

git config --global http.cookiefile [PATH/TO/COOKIEFILE] 

Is there current support for this?

Thank you!