Do not append a leading slash to path

[reynir]

I found that I could not fetch the repo http://git.data.coop/halfd/new-website.git. With full debug logs I was able to gather that http://git.data.coop//halfd/new-website.git was requested instead, and gitea treats that as an error and returns 404.

This PR removes the extra leading slash and adds a test case.

[reynir]

There are similar errors in Smart_git.Endpoint.pp for git protocol and likely generic scheme protocol.

[hannesm]

I just run into this issue as well... would be great to have it merged & released :)

[dinosaure]

Thanks, I will cut a release as soon as I can.