* cp plugin: change cpv to function so that completion works

* cp plugin: show numbers in units of 1024 (K,M,G,T)

Use `-h` level (3): output numbers in units of 1024.
See the manpage of rsync for more information.

* cp plugin: add a README file

* cp plugin: recurse directories

* cp plugin: remove `--` to separate files from options

This has some undesired effects, like having `cpv --help` be a file
not found error.

Use `--` yourself if you need it (which you generally don't):

```zsh
cpv -- -some-file-with-hyphens.txt /tmp
```

Added this same info to the README.

Adds commits from #3007 and #5158.

Closes #3007
Closes #5158

Fixes #5246

Copy of the official repository:
https://github.com/rust-lang/cargo/tree/master/src/etcSigned-off-by: NMarc Cornellà <marc.cornella@live.com>

It was not possible to simply add AM/PM since strftime return blank for %p %P

This reverts commit 06d52a60.

the Rust build system

Signed-off-by: NMat Munn <mat@savi.com.au>

Closes #5460

This commit removes most of its contents: it just leaves the
contribution signature. The rest is obsolete and superseeded
by #5460, but the contribution is still valuable.

Related: #4263.
Signed-off-by: NMarc Cornellà <marc.cornella@live.com>

The current list of directories to search for autoenv on misses the default location on Ubuntu systems if you just do a normal `pip install autoenv` - [it will place](https://github.com/kennethreitz/autoenv/blob/master/setup.py#L16) `activate.sh` in `/usr/local/bin` unless you manually override the `--prefix` or something.

The `/usr/local/opt/autoenv` is fine for macOS/homebrew installations but it would be nice not to have to manually patch on Linux :)

When making a WIP commit, we generally just want to save the state of the
current branch temporarily, maybe because we want to push our work for backup
purposes, or change branch to work on something else. Therefore, it's generally
undesirable to run Git hooks, which might do things like run linters, because
we probably don't care if our WIP has lint errors.

Fix extract of deb packages with data.tar.xz

`${var:t:h}` uses:

- `${var:t}` which acts as `basename`.

- `${var:r}` which removes the extension.

See http://zsh.sourceforge.net/Doc/Release/Expansion.html#Modifiers

Closes #5462