Write access for deploy keys

Created by: mcfedr

I would like to suggest having an option to give a deploy key write access to a project.

I have been using deploy keys for a few projects now, and every so often I have some changes on the server that i want to get back into my code. So far I have used format-patch for this.

I think it would be nice to be able to give a deploy key tempory write access, maybe even a write once option, so just one pull is accepted, and then the key is reverted to read only. Another option is to allow writes only to new branches.