[Ubuntu Wiki] Update of "Bugs/HowToFilter" by kfogel

[Ubuntu Wiki]

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The following page has been changed by kfogel:
http://wiki.ubuntu.com/Bugs/HowToFilter?action=diff&rev1=11&rev2=12

The comment on the change is:
Clarify what the 'X-Launchpad-Bug' header is, and more clearly link out to the canonical reference page on bug email headers.

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  So depending on how much bug email you get through team subscriptions, you should filter your email to two (subscribers @team/subscriber (package-product-etc)) or three or more (separate some or all teams) mail boxes.
  
- In addtion to the `X-Launchpad-Message-Rationale:` header [[https://help.launchpad.net/Bugs/Subscriptions#headers | Launchpad provides some other useful headers]] including `X-Launchpad-Bug:`, `X-Launchpad-Bug-Tags`, `X-Launchpad-Bug-Private` and `X-Launchpad-Bug-Security-Vulnerability`.
+ In addtion to the `X-Launchpad-Message-Rationale:` header Launchpad provides some other useful headers, including `X-Launchpad-Bug:`, `X-Launchpad-Bug-Tags`, `X-Launchpad-Bug-Private` and `X-Launchpad-Bug-Security-Vulnerability`.  (The `X-Launchpad-Bug:` header actually represents a [[http://bazaar.launchpad.net/~launchpad-pqm/launchpad/devel/annotate/head%3A/lib/lp/bugs/doc/bugtask.txt|bug task]] and may appear multiple times in a single email.  Each one contains information about various properties of that bug task, including: distribution, product, distroseries, sourcepackage, component, milestone, status, importance and assignee.)  All of these headers provide additional ways to filter e-mail -- they are especially useful if you are subscribed to a lot of bug mail.  
  
- The `X-Launchpad-Bug:` header contains information about various properties of the bug including: distribution, product, distroseries, sourcepackage, component, milestone, status, importance and assignee.  All of which provide additional ways to filter e-mail - especially if you are subscribed to large bug mailing lists.
+ See the [[https://help.launchpad.net/Bugs/Subscriptions#headers|Launchpad bug email headers page]] for more detailed information about these headers.
  
  == Example filters ==