MD5 APR

- [x] Add the JtR ref. for https://github.com/openwall/john/blob/a19784d685ea6dde598d3519f641844df47bd211/src/md5crypt_long_fmt.c
- [x] fix regexp to add `$1$` and `{smd5}` prefixes too
- [x] add crypt(3) name
- [x] add samples

```
MD5(APR) [HC: 1600]
Apache MD5 [HC: 1600]
md5apr1 [HC: 1600]
```
