The idea is that we will normally use only the already-built
versions (in dist/) and won't build from source on every install,
but we do want the source in here

Right now, this is the powder version of the CSS; will need to figure
out how to build different versions from different variables.less files

description in CreateImage();

running.

hand). Also add enable sitevar since we run this only on clusters that
support portstats on the control network.

easily get to the experiment (or portal status page).

Portal) that the experiment was created on.

* Add portal url to the existing emulab extension that tells the CM the
  CreateSliver() is coming from the Portal. Always send this info, not
  just for the Emulab Portal.

* Stash that info in the geni slice data structure so we can add links
  back to the portal status page for current slices.

* Add routines to generate a portal URL for the history entries, since
  we will not have those links for historical slices. Add links back to
  the portal on the showslice and slice history pages.

manifest we have store in the DB. Basically a highly stripped down
version of the status page.

IPs on the lan and we fill them in, we put those IPs into the manifest,
but we also have to put the netmask in, since without that, the update
operation will get confused.

if the underlying Emulab experiment; return a busy error instead.

Merge clientside openssl-1-1-0 branch

See merge request emulab/emulab-devel!40