added new 'limit' functionality to 'process' graph
added new 'limit' functionality to 'serv' graph
added new 'limit' functionality to 'mail' graph
added new 'limit' functionality to 'port' graph
added new 'limit' functionality to 'user' graph
added new 'limit' functionality to 'ftp' graph
added new 'limit' functionality to 'apache' graph
added new 'limit' functionality to 'nginx' graph
added new 'limit' functionality to 'lighttpd' graph
added new 'limit' functionality to 'mysql' graph