network: refactor code, rename files
network: update ip4/ip6 available value for vpn
network: add support for vpn-pptp
network: add support for vpn-vpnc
network: refactor code, lowercase global variables
network: add general function newVpnConnectionData()
network: refactor code, move definitions about connection types, pages and fields to nm_setting_type_page_field.go
network: add support for vpn-openvpn
network: update nm_autogen, add EnableWrapper property for virtual key
network: refactor code, rename virtual keys
network: update autogen code, about EnableWrapper property for virtual key
network: update code for openvpn