Report tentative matches when scanning text for remote bug URLs

[Gavin Panella]

The MySQL bug tracker has two URL forms for a bug:

  http://bugs.mysql.com/24788

and

  http://bugs.mysql.com/bug.php?id=24788

`BugWatchSet.parsePHPProjectURL()` can safely match the longer form, and `BugWatchSet.extractBugTrackerAndBug()` will auto-create a bug tracker based on those details, or reuse an existing tracker.

However, the shorter form is probably too general to safely match and auto-create a bug tracker from. But if the bug tracker is already registered, we probably should match it.

The `BugWatchSet.parse*URL` methods each return a 2-tuple, of (base_url, remote_bug). They could be changed to return a 3-tuple, of (base_url, remote_bug, tentative), where `tentative` is a boolean. `BugWatchSet.extractBugTrackerAndBug()` would then not auto-create a bug tracker if an existing one is not found. It should also continue to try and find a non-tentative match before falling back on the tentative match.

[Robert Collins (lifeless)]

I don't understand what this is about - to whom would we report this?

[Robert Collins (lifeless)]

I suspect this is something like 'bugwatches to site:1234' do not autocreate a bug watch or something.