Changes to the init manifest

This patch makes a few changes to the init manifest:

  * Adds a documentation header
  * Adds a root_helper parameter
  * Removes the rootwrap_conf option
  * Removes the rootwrap.conf file
  * Formatting fixes

Change-Id: I8c15a7227296aecd94174fce9df8c7067d673e3d
Merge "Changes to the init manifest"