issue where some global jail_* variables were overriden in the script. [1]
- Change "jid" to "jname" in rc.conf(5), since it's more a jail name than a
jail id. [1]
- Update examples and comments in defaults/rc.conf to advertise new
variables and the fact that some of the jail-specific variables may be made
jail-global. [2]
Reported by: pjd [1], clsung [2]
Approved by: cperciva
X-MFC after: i got sufficient testing from people using rc.d/jail
76e07854c3