[arch-general] [signoff] openvpn 2.1_rc19-1

Changes: - Updated to the 2.1 branch - Removed useless .install file - Moved plugins to /usr/lib/openvpn and made this the default plugin search path (i.e. plugins in that directory will be found when the plugin directive does is not an absolute path) - Moved example configuration to /usr/share/openvpn - Add openvpn rc.d script that launches an openvpn daemon for /etc/openvpn/*.conf and kills each openvpn with a pidfile in /var/run/openvpn/*.pid - Add openvpn-tapdev script that is to be added before the network script. It creates persistent tap devices as configured in /etc/conf.d/openvpn-tapdev that can be used for bridging. Tested on x86_64, please sign off.