DB initialization: pick enabled interface as green. Refs #2796
Remove hosts.{allow,deny}. Refs #2785
resolv.conf: check if dnsmasq is enabled. Refs #2915
Require recent nethserver-lib, to show event errors. Refs #2927

Requires: nethserver-lib > 2.1.1-1
Start detached hostname-modify event. Refs #2927

The event restarts httpd-admin and must run detached, to report errors
correctly.
first-boot: run initial configuration before tty login
first-boot: do not catch signals. Refs #2952
FQDN page: updated warning message. Refs #2927

The connection is lost during the event due to new SSL certificates.

The new warning message explains to reload the page manually, only if
no custom certs are installed.
db: remove role property. Refs #2915
resolv.conf: check if dnsmasq is installed. Refs #2915
Merge branch 'b2785'
Remove hosts.allow, hosts.deny and localnetworks files. Refs #2785
Merge remote-tracking branch 'origin'. Refs #2785