* Fix incorrect link and add missing ones for pod template
The current link to the pod template is pointing to replication controller
page. Also couple places missing a link to get better view of what pod
template is.
* fix pod link
* fix pods url
Reading through the communication patterns it was not obvious to me that the `hostPort` option is something I have to set myself.
While the **DNS** and **Service** options explicitly say one has to *create a service*.
* Update links to outdated user-guide and admin docs
* Add script for updating outdated links.
* Update regex to include init-containers file.
* Pull upstream, rewrite links in and to namespaces walkthrough.