MFC 256440, 256498:

MFC 256440, 256498:

 - Normalize jailname.  "example.com" is converted to "example_com".
 - Fix a bug that some $jail_{jname}_foo variables did not work.
 - Fix a bug which prevented $jail_devfs_ruleset from working[1].
 - Move $jail_parameters to the last of the configuraiton lines[1].
 - Fix "ifname|addr" syntax support in jail_{jname}_ip.
 - Create /var/run/jail_{jname}.id because ezjail-admin depends on it.

Reported by:	jase [1]
Approved by:	re (gjb)

git-svn-id: svn://svn.freebsd.org/base/stable/10@256668 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f