Currently, such tools as poudriere, ezjail, etc are using jails. But, jail names aren't validated there (at least in poudriere). For example, you can create podudriere-jail "9.1R", but you can't run build - since jail failing start jail with such name. To not reimplement name validation in many places, jail subsyste, should provide unified way to validate jail names.
Responsible Changed From-To: freebsd-bugs->freebsd-jail reclassify.
For bugs matching the following criteria: Status: In Progress Changed: (is less than) 2014-06-01 Reset to default assignee and clear in-progress tags. Mail being skipped