pfSense

Do not perform RADIUS accounting/prune operations when node is in backup mode
Implement Redmine #97

Backup node : fetch user list and in-use/expired vouchers from master node.
Implement Redmine #97

Create a new page dedicated to backward sync
Implement Redmine #97

Fix backward vouchers synchronization
Redmine #7972

Merge pull request #4306 from vktg/hidearmnetboot

Merge branch 'master' into aliasclone

Merge pull request #4311 from vktg/dyndnscopy

Merge pull request #4312 from vktg/dynv6

Merge pull request #4309 from vktg/idndnslookup

Merge pull request #4316 from vktg/idnalias