Added links to fix pbi problem /w i386 and amd64 

Line 154
// Check for pbi install and arch type then create symlinks
	if (file_exists('/usr/pbi/vnstat-i386')) { exec("ln -s /usr/local/etc/vnstat.conf /usr/pbi/vnstat-i386/etc/vnstat.conf"); }
	if (file_exists('/usr/pbi/vnstat-amd64')) { exec("ln -s /usr/local/etc/vnstat.conf /usr/pbi/vnstat-amd64/etc/vnstat.conf"); }