pep 8
Merge remote-tracking branch 'allegro/develop' into dns_and_dhcp_forms
additional validation in dns fors - one ptr record is required
additional validation in dns form - fix
DHCP form - additional validation
add dhcp_broadcast to Noetwork model
new networks dhcp config generator
dhcp conf head generation - fix
dhcp config generation - fixes and optimization
fixes
dhcp - tests
Merge remote-tracking branch 'allegro/develop' into dns_and_dhcp_forms
change log
ralph_dhcp_agent - new version
changes.rst update
dhcp - fixes and improvements
missing migrations added
after code review fixes
after CR fixes
Merge pull request #731 from andrzej-jankowski/dns_and_dhcp_forms

DHCP - fixes, improvements, optimizations