PreviousPageURI may not work

[kevinburke]

If you go to Page=2 by following next_page_uri links, then try to get the previous_page_uri, you get back a 400 from the Twilio API. I've written the API team to ask why that is.

[kevinburke]

API team is aware of this issue and working on a fix

[kevinburke]

Commit 5724a23 now links to this issue if you hit this error in Logrole. Unfortunately the error doesn't have an associated error code, so I'm matching based on the error string:

    str := strings.Replace(err.Error(), "twilio: ", "", 1)
    if strings.Contains(strings.ToLower(str), "aftersid is required for paging") {
        str = str + " See https://github.com/saintpete/logrole/issues/2"
    }

(cc @dougblack)