Update Packetfence v-4.0.6

changelog v-4.0.6:

• Update NEWS file ; NEWS.asciidoc
• Clear an object internally when retreiving directly from chi
• Removed the localization of lib/pf/authentication.pm in first filter
• Fixed issues with services not stopping

PacketFence is a fully supported, trusted network access control (NAC) system. It includes a captive portal for registration and remediation, centralized wired and wireless management, 802.1X support, layer-2 isolation of problematic devices, and integration with the Snort IDS and the Nessus vulnerability scanner. It can be used to effectively secure networks, from small to very large heterogeneous networks.