Fix lots of broken links in the docs, found by Sphinx' external link checker.
diff --git a/Doc/bugs.rst b/Doc/bugs.rst
index 8b8df81..9abe50c 100644
--- a/Doc/bugs.rst
+++ b/Doc/bugs.rst
@@ -53,7 +53,7 @@
Article which goes into some detail about how to create a useful bug report.
This describes what kind of information is useful and why it is useful.
- `Bug Writing Guidelines <http://www.mozilla.org/quality/bug-writing-guidelines.html>`_
+ `Bug Writing Guidelines <http://developer.mozilla.org/en/docs/Bug_writing_guidelines>`_
Information about writing a good bug report. Some of this is specific to the
Mozilla project, but describes general good practices.