Add tag to dhcpoption
dhcpboot with less required parameters
Merge branches 'add_tag_dhcpoption' and 'required_params_dhcpboot'
Rename value to ip on ptr class and template
Merge pull request #10 from guimaluf/rename_ptr_value_to_ip

Rename ptr value to ip, dhcpboot with less params, tag to dhcpoption.
Revert "Rename value to ip on ptr class and template"

This reverts commit 558181e997bfeb39c08b306418e082064de34c91.
[README] update with new changes & show some optional options
[docs] prepare for 2.4.0 release
[template/main class] add config_hash option
[fix] removed use of private concat class
[dnsmasq.conf] save commented original before replacing
[service] configurable service state
[service] use generic service name
upd: template fixes, added array handling
add: dnsserver_simple define
upd: make dnsmasq config dir optional