Nuster 1.7.9.8 released – A web caching proxy server based on HAProxy

[nuster](https://github.com/jiangwenyuan/nuster), A web caching proxy server based on HAProxy released v1.7.9.8

Added more cache purging methods, by host, by path, by regex and their combinations.

### Added

- Purge cache by host

- Purge cache by path

- Purge cache by regex

### Changed

- Incorrect host and path of cache.entry