Update Openfire broadcast tool (#742)

Allow users to ignore invalid certificates.
Added some limited user feedback.
Removed threading.
Prevent infinite connection attempt loops.

docs/installation/auth/settings.md

@@ -68,6 +68,7 @@ If using Openfire, the following need to be set in accordance with the [install
  - [BROADCAST_USER](#broadcast-user)
  - [BROADCAST_USER_PASSWORD](#broadcast-user-password)
  - [BROADCAST_SERVICE_NAME](#broadcast-service-name)
+ - [BROADCAST_IGNORE_INVALID_CERT](#broadcast-ignore-invalid-cert)
 
 ### Mumble
 If using Mumble, the following needs to be set to the address of the mumble server:

docs/installation/services/openfire.md

@@ -82,6 +82,8 @@ Navigate to the `Server` tab, `Server Manager` subtab, and select `System Proper
  - Name: `plugin.broadcast.allowedUsers`
    - Value: `broadcast@example.com`, replacing the domain name with yours
    - Do not encrypt this property value
+   
+If you have troubles getting broadcasts to work, you can try setting the optional (you will need to add it) `BROADCAST_IGNORE_INVALID_CERT` setting to `True`. This will allow invalid certificates to be used when connecting to the Openfire server to send a broadcast.
 
 ### Group Chat
 Channels are available which function like a chat room. Access can be controlled either by password or ACL (not unlike mumble).