Xxh-xxh

**xxh**
* Fix `+hh` and `+hhh` logic

This major xxh release contains breaking and significant changes:
* Default `$HOME` on the host was set to `$XXH_HOME` (`~/.xxh` by default). It makes xxh session more hermetic. If you want to stay at default `~/` on the host use `+hhh "~"` argument (you can add it to config `~/.xxh/.xxhc`).
* xxh packages directory renamed from `~/.xxh/xxh` to `~/.xxh/.xxh` to make `$XXH_HOME` more clear. You should reinstall your xxh packages using `xxh +RI <package>` and update your hosts by using `+if` argument.
* All xxh family updated along with changes above

**xxh**
* Fix files permissions

**xxh.bash**
* Fixed shell name

Maintenance

**xxh**
* Final step to portable xxh binary
* Improved packages operations logic

**xxh**
* Fix host info checks