Alternate design of preserving metadata in PSA#757

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jafingerhut wants to merge 11 commits intop4lang:mainfrom

jafingerhut:psa-alternate-design-for-preserved-metadata

Commits on Apr 29, 2019

Altnerate design of preserving metadata in PSA
Andy Fingerhut
committed
Add NewPacketMetadataInitializer control
Andy Fingerhut
committed
Add proposed figure showing PSA with all packer & unpacker controls
Andy Fingerhut
committed
Add a file psa-packer-unpacker-pseudocode.p4
Andy Fingerhut
committed

Commits on May 3, 2019

Remove TBDs asking whether headers should be input to Packer controls
Andy Fingerhut
committed
Add a DigestCreator control for creation of digest messages
Andy Fingerhut
committed

Commits on May 4, 2019

Fix typo
Andy Fingerhut
committed
Merge branch 'master' into psa-alternate-design-for-preserved-metadata
Andy Fingerhut
authored
Add proposed "specification in code" of PSA architecture
Andy Fingerhut
committed
A few small corrections to psa-arch-defn.p4
Andy Fingerhut
committed

Commits on May 6, 2019

A few updates to file psa-arch-defn.p4
Andy Fingerhut
committed