Start the first part of a migration for assets
stored in _common_assets:
- Branch the legalnotice.xml, licence-openssl.xml,
and license-zookeeper.xml to a new location under
_build/perforce called "common_xml".
- Update the CmdRef, P4API, P4Dist, P4Guide, and
P4SAG to utilize these XML files in the new location.
A later changelist will remove _common_assets, and
remove some unnecessary clutter within p4-doc/manuals.
Before this happens, any other guides using these files
will also need to be updated to use the new locations.