Allow moduli to be pulled as file

Added Jinja logic to allow the option to pull the moduli from an online source.

openssh/moduli.sls

 {% from "openssh/map.jinja" import openssh with context %}
 
-{% if salt['pillar.get']('openssh:moduli', False) %}
+{% set moduli = salt['pillar.get']('openssh:moduli', False) -%}
+{% set moduli_source = salt['pillar.get']('openssh:moduli_source', False) -%}
+{% if moduli or moduli_source -%}
 ssh_moduli:
   file.managed:
     - name: {{ openssh.ssh_moduli }}
+    {% if moduli -%}
+    # Although we have the contents of the moduli in the variable 'moduli',
+    # inlining the variable here *will* cause problems. Using the '|' literal string indicator
+    # Necessitates using the '|indent' filter, and this is too complex.
+    # Rather, let salt read the pillar itself.
     - contents_pillar: openssh:moduli
+    {% elif moduli_source -%}
+    - source: {{ moduli_source }}
+    - source_hash: {{ moduli_source|trim }}.hash
+    {%- endif %}
 {% endif %}