docs/77610: update jail(8) because 'make world' doesn't work anymore

[Xin LI]

Synopsis: update jail(8) because 'make world' doesn't work anymore

State-Changed-From-To: open->closed
State-Changed-By: delphij
State-Changed-When: Wed Feb 16 17:20:37 GMT 2005
State-Changed-Why: 
While it's true that a lone "make world" won't work, make
world with DESTDIR specified does work well.

http://www.freebsd.org/cgi/query-pr.cgi?pr=77610