Unshare

Unshare is used at run time in 5 crates.

Number of dependers	Unshare version	Downloads/month
0	0.7.0	550
1	0.3.0	0
1	0.2.0	16
3	0.1.15	17

Depender (with downloads and own rev deps)			Unshare version
		lithos		^0.3.0
		isolate		^0.2.0
		lsns		^0.1.14
		nsenter		^0.1.14
	2	nsutils		^0.1.14