Re: [PATCH 1/2] worktree: add CLI/config options for relative path linking

> Additionally, it appears that this patch breaks at least t0001-init.sh,
> but others as well. The relevant portion of -vx from t0001.46 is:
>
>     --- 8< ---
>     + git -C mainwt config worktree.useRelativePaths true
>     + git -C mainwt worktree add --detach ../linkwt
>     Preparing worktree (detached HEAD 89e2b84)
>     HEAD is now at 89e2b84 gumby
>     + git -C mainwt init --separate-git-dir ../seprepo
>     Reinitialized existing Git repository in /home/ttaylorr/src/git/t/trash directory.t0001-init/seprepo/
>     + git -C mainwt rev-parse --git-common-dir
>     fatal: repo version is 0, but v1-only extension found:
>       relativeworktrees
>     --- >8 ---
>
> Let's please fix this breakage, and then decide what we are going to do
> with the extension in the second patch relatively soon, as I worry that
> putting the original topic on master may have been a mistake if it is
> going to break worktree pruning on earlier Git versions.