Include .rubocop.yml from PR rapid7#3649

Author: Tod Beardsley

.rubocop.yml

@@ -0,0 +1,56 @@
+# This list was intially created by analyzing the last three months (51
+# modules) committed to Metasploit Framework. Many, many older modules
+# will have offenses, but this should at least provide a baseline for
+# new modules.
+#
+# Updates to this file should include a 'Description' parameter for any
+# explaination needed.
+
+# inherit_from: .rubocop_todo.yml
+
+Style/ClassLength:
+  Description: 'Most Metasploit modules are quite large. This is ok.'
+  Enabled: true
+  Exclude:
+    - 'modules/**/*'
+
+Style/Documentation:
+  Enabled: true
+  Description: 'Most Metasploit modules do not have class documentation.'
+  Exclude:
+    - 'modules/**/*'
+
+Style/Encoding:
+  Enabled: true
+  Description: 'We prefer binary to UTF-8.'
+  EnforcedStyle: 'when_needed'
+
+Style/LineLength:
+  Description: >-
+                  Metasploit modules often pattern match against very
+                  long strings when identifying targets.
+  Enabled: true
+  Max: 180
+
+Style/MethodLength:
+  Enabled: true
+  Description: >-
+                  While the style guide suggests 10 lines, exploit definitions
+                  often exceed 200 lines.
+  Max: 300
+
+Style/NumericLiterals:
+  Enabled: false
+  Description: 'This often hurts readability for exploit-ish code.'
+
+Style/SpaceInsideBrackets:
+  Enabled: false
+  Description: 'Until module template are final, most modules will fail this.'
+
+Style/StringLiterals:
+  Enabled: false
+  Description: 'Single vs double quote fights are largely unproductive.'
+
+Style/WordArray:
+  Enabled: false
+  Description: 'Metasploit prefers consistent use of []'