Pkgng to setup ports and install pkgng

* [x] attempt to setup ports and install pkgng https://github.com/xaque208/mfsbsd/commit/61934e440a9f12eb514fe8bbc0f15f04324115ed
* [x] finish setting up pkgng https://github.com/xaque208/mfsbsd/commit/42973e526d03f069bd95f807d04212b2b63e09b6