Remove redmine links

There were still links to the redmine tracker in our documentation. This patch
removes them and replaces them with the Jira URL instead.

Signed-off-by: Ken Barber <ken@bob.sh>
Merge pull request #858 from kbarber/maint/1.5.x/remove-redmine-references

Remove redmine links
(pdb-343)(packaging) Remove Fedora 18 from default package builds

Fedora 18 reached end-of-life on 1/14/14.
This removes Fedora 18 from the list of default package builds.
Merge pull request #863 from shrug/maint/pdb-343/1.5.x

(pdb-343)(packaging) Remove Fedora 18 from default package builds
Merge branch '1.5.x' into 1.6.x

* 1.5.x:
  (pdb-343)(packaging) Remove Fedora 18 from default package builds
  Remove redmine links

Conflicts:
	ext/build_defaults.yaml