SSL Offload causes "warning" on browser

The STREAM::expression wiki page actually has a great example of doing this:

 Example which replaces http:// with https:// in response content
 Prevents server compression in responses
when HTTP_REQUEST {
     Disable the stream filter for all requests
    STREAM::disable

     LTM does not uncompress response content, so if the server has compression enabled
     and it cannot be disabled on the server, we can prevent the server from 
     sending a compressed response by removing the compression offerings from the client
    HTTP::header remove "Accept-Encoding"
}
when HTTP_RESPONSE {
     Check if response type is text
    if {[HTTP::header value Content-Type] contains "text"}{
         Replace http:// with https://
        STREAM::expression {@http://@https://@}
         Enable the stream filter for this response only
        STREAM::enable
    }
}