Restructuring/renaming DNS, DHCP, TFTP and netboot installer.

Idea: The role 'dnsmasq' and a new role 'dns-dhcp-tftp' are
drop-in replacements and interchangeable. 'netboot-installer'
works indepently of the role chosen for DNS, DHCP and TFTP.

roles/tftp-netboot-installer/tasks/main.yml

@@ -1,33 +0,0 @@
-- name: make preseed directory available
-  file:
-    path: "{{ tftp_root }}/d-i/{{ di_dist }}"
-    state: directory
-
-- name: install di-netboot-assistant and installer package
-  apt:
-    name:
-      - di-netboot-assistant
-      - "{{ di_pkg }}"
-  notify:
-    - bind mount images
-    - rebuild di-netboot-assistant menu
-
-- name: provide preseed file
-  copy:
-    src: /usr/share/doc/di-netboot-assistant/examples/preseed.cfg
-    dest: "{{ tftp_root }}/d-i/{{ di_dist }}"
-    force: no
-
-- name: configure dnsmasq
-  template:
-    src: dnsmasq-tftp-netboot-installer.j2
-    dest: /etc/dnsmasq.d/tftp-netboot-installer
-  notify:
-    - restart dnsmasq
-    - rebuild di-netboot-assistant menu
-
-- name: make the hostname resolvable from the LAN
-  replace:
-    path: /etc/hosts
-    regexp: '^(127\.0\.1\.1.*)$'
-    replace: '#\1\n{{ ipaddr_lan | ipaddr("address") }}	{{ ansible_hostname }}.{{ ansible_domain }}	{{ ansible_hostname }}'