Describe the feature or problem you’d like to solve

When using schannel in a corporate proxy environment, git operations may fail when attempting to check the TLS certificate of the remote server against a revocation list (see known issues).

Implementing the workaround as described requires manually editing a gitconfig file which may be challenging for some users who are not used to modifying configuration files. This file also expects unix-style line endings which may be difficult to do in a Windows environment.

Proposed solution

Expose git configuration settings http.sslBackend and http.schannelCheckRevoke in GitHub Desktop settings, perhaps under the existing "git" or "advanced" tab.