[Pki-devel] [PATCH] 221 Added upgrade framework.

A new Python module has been added to provide a framework for upgrade scriplets. A new tool called pkirespawn has been added to execute the scriptlets. Upgrade tracker and command-line options will be added separately. The pki.conf has been moved from pki-server to pki-base. Ticket #544, #553 -- Endi S. Dewata