docs: Document SP migration from old to new code.
docs: Document SP migration from old to new code.

Update issue 207
Status: Started
Owner: andreassolberg
The document should be added to the documents at rnd.feide.no.

git-svn-id: a243b28a2a52d65555a829a95c8c333076d39ae1@1823 44740490-163a-0410-bde0-09ae8108e29a

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