Re: [PATCH v5] status: long status advice adapted to recent capabilities

> From: Rudy Rigot <rudy.rigot@gmail.com>
> 
> Improve the advice displayed when `git status` is slow because
> of excessive numbers of untracked files.  Update the `git status`
> man page to explain the various configuration options.
> 
> `git status` can be slow when there are a large number of untracked
> files and directories, because Git must search the entire worktree
> to enumerate them.  Previously, Git would print an advice message
> with the elapsed search time and a suggestion to disable the search
> using the `-uno` option.  This suggestion also carried a warning
> that might scare off some users.
> 
> Git can reduce the size and time of the untracked file search when
> the `core.untrackedCache` and `core.fsmonitor` features are enabled
> by caching results from previous `git status` invocations.
> 
> Update the advice to explain the various combinations of additional
> configuration options and refer to (new) documentation in the man
> page that explains it in more detail than what can be printed in an
> advice message.
> 
> Finally, add new tests to verify the new functionality.
> 
> Signed-off-by: Rudy Rigot <rudy.rigot@gmail.com>