rename net-ip -> search-ip;
add file-clean besides file-linkbin where file-clean was taken off;
change device db schema (host in mac table -> mac in host table);
rename cfg-setarp -> net-setarp;
file-clean should be prior to file-linkbin;
list-hosts takes subnet par;
list-hosts uses net-name instead of info-net;
net-search: refactoring;
net-tree: use ip address instead of hostname for ping;
add cidr output;
use nmap for broadcast ping;