roles/nginx: Add package deps for Let's Encrypt on Debian 9

Taken from running certbot-auto on a clean Debian 9 installation.

roles/nginx/tasks/letsencrypt.yml

@@ -63,4 +63,57 @@
     - zlib1g-dev
   tags: packages
 
+# dependencies certbot checks for on its first run
+# taken from running certbot right after a clean Debian 9 install
+- name: Install certbot dependencies (Debian 9)
+  when: ansible_distribution == 'Debian' and ansible_distribution_major_version | version_compare('9', '==')
+  apt: name={{ item }} state=present update_cache=yes
+  with_items:
+    - augeas-doc
+    - augeas-tools
+    - autoconf
+    - automake
+    - binutils
+    - bison
+    - cpp
+    - cpp-6
+    - flex
+    - gcc-6
+    - gcc-doc
+    - gcc-multilib
+    - gdb
+    - libasan3
+    - libatomic1
+    - libc-dev-bin
+    - libc6-dev
+    - libcc1-0
+    - libcilkrts5
+    - libexpat1-dev
+    - libffi-dev
+    - libgcc-6-dev
+    - libgomp1
+    - libisl15
+    - libitm1
+    - liblsan0
+    - libmpc3
+    - libmpx2
+    - libpython-dev
+    - libpython2.7
+    - libpython2.7-dev
+    - libquadmath0
+    - libssl-dev
+    - libtool
+    - libtsan0
+    - libubsan0
+    - linux-libc-dev
+    - make
+    - python-dev
+    - python-pip-whl
+    - python-pkg-resources
+    - python-virtualenv
+    - python2.7-dev
+    - python3-virtualenv
+    - virtualenv
+  tags: packages
+
 # vim: set ts=2 sw=2: