docs: set unsafe HTML parsing to false and fix raw HTML insertion

This means that markdown files can't contain <thing> any more.

docs/content/union.md

@@ -4,7 +4,7 @@ description: "Remote Unification"
 date: "2020-01-25"
 ---
 
-<i class="fa fa-link"></i> Union
+{{< icon "fa fa-link" >}} Union
 -----------------------------------------
 
 The `union` remote provides a unification similar to UnionFS using other remotes.
@@ -173,7 +173,7 @@ Copy another local directory to the union directory called source, which will be
 
     rclone copy C:\source remote:source
 
-<!--- autogenerated options start - DO NOT EDIT, instead edit fs.RegInfo in backend/union/union.go then run make backenddocs -->
+{{< rem autogenerated options start" - DO NOT EDIT - instead edit fs.RegInfo in backend/union/union.go then run make backenddocs" >}}
 ### Standard Options
 
 Here are the standard options specific to union (Union merges the contents of several upstream fs).
@@ -191,7 +191,7 @@ Can be 'upstreama:test/dir upstreamb:', '"upstreama:test/space:ro dir" upstreamb
 
 #### --union-action-policy
 
-Policy to choose upstream on ACTION class.
+Policy to choose upstream on ACTION category.
 
 - Config:      action_policy
 - Env Var:     RCLONE_UNION_ACTION_POLICY
@@ -200,7 +200,7 @@ Policy to choose upstream on ACTION class.
 
 #### --union-create-policy
 
-Policy to choose upstream on CREATE class.
+Policy to choose upstream on CREATE category.
 
 - Config:      create_policy
 - Env Var:     RCLONE_UNION_CREATE_POLICY
@@ -209,7 +209,7 @@ Policy to choose upstream on CREATE class.
 
 #### --union-search-policy
 
-Policy to choose upstream on SEARCH class.
+Policy to choose upstream on SEARCH category.
 
 - Config:      search_policy
 - Env Var:     RCLONE_UNION_SEARCH_POLICY
@@ -225,4 +225,4 @@ Cache time of usage and free space (in seconds). This option is only useful when
 - Type:        int
 - Default:     120
 
-<!--- autogenerated options stop -->
+{{< rem autogenerated options stop >}}