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/sftp.md

@@ -4,7 +4,7 @@ description: "SFTP"
 date: "2017-02-01"
 ---
 
-<i class="fa fa-server"></i> SFTP
+{{< icon "fa fa-server" >}} SFTP
 ----------------------------------------
 
 SFTP is the [Secure (or SSH) File Transfer
@@ -152,7 +152,7 @@ upload (for example, certain configurations of ProFTPd with mod_sftp). If you
 are using one of these servers, you can set the option `set_modtime = false` in
 your RClone backend configuration to disable this behaviour.
 
-<!--- autogenerated options start - DO NOT EDIT, instead edit fs.RegInfo in backend/sftp/sftp.go then run make backenddocs -->
+{{< rem autogenerated options start" - DO NOT EDIT - instead edit fs.RegInfo in backend/sftp/sftp.go then run make backenddocs" >}}
 ### Standard Options
 
 Here are the standard options specific to sftp (SSH/SFTP Connection).
@@ -196,6 +196,15 @@ SSH password, leave blank to use ssh-agent.
 - Type:        string
 - Default:     ""
 
+#### --sftp-key-pem
+
+Raw PEM-encoded private key, If specified, will override key_file parameter.
+
+- Config:      key_pem
+- Env Var:     RCLONE_SFTP_KEY_PEM
+- Type:        string
+- Default:     ""
+
 #### --sftp-key-file
 
 Path to PEM-encoded private key file, leave blank or set key-use-agent to use ssh-agent.
@@ -339,7 +348,7 @@ Set to skip any symlinks and any other non regular files.
 - Type:        bool
 - Default:     false
 
-<!--- autogenerated options stop -->
+{{< rem autogenerated options stop >}}
 
 ### Limitations ###