Improving docstrings for policy API

The docstring for the policy API has some wrong examples and is
lacking examples of other types of checkings already available to
be used on policy languages. This patch corrects it.

Change-Id: I8d8ed04b10a28ca2ade5aaf95bc080c39472ae32
Add more to the release notes

Expand the boilerplate for the release notes emails, including links to
the bug tracker and milestone page in launchpad.

Change-Id: Ifad658f532b5d549144008170bfe2e4181038ddf
Curl statements to include globoff for IPv6 URLs

Httpclient displays curl statements for debugging/troubleshooting
purposes. For IPv6 URLs, where IP address is enclosed in square
brackets, curl requires --globoff to be passed in the arguments.
Since clients does not use curl directly, this patch displays
the curl commands with globoff option which works for both
IPv4 and IPv6 URLs.

Note: This patch is required for curl older than version 7.32

Closes-Bug: #1228744
Change-Id: I63dd583d6eb3f3b0f041ad48843d79567b9db6a2
Merge "Improving docstrings for policy API"
Merge "Curl statements to include globoff for IPv6 URLs"