- Move ca/cert/key out of query part into credentials part of URL
- As a consequence move cluster name out of credentials part into path part
- Allow both neo:// and neos:// schemes to be used.
  neo:// means always without SSL and neos:// means always with SSL.
  Even if neos:// URL comes without credentials embedded into it - they
  can be obtained from elsewhere.

I need this change in wendelin.core 2 which needs to take a zurl and
compute a mountpoint patch that corresponds to it, so that multiple
several zopes that use the same NEO storage, could be associated with
the same single WCFS instance.