Address Section 2.3, MPI_Start() semantics of the INOUT and Language Bindings

[tonyskjellum]

Problem

Review the Semantics described in Section 1.3, and MPI_Start() having the INOUT request; disallow that request to be altered.

Proposal

Review the Semantics described in Section 1.3, and MPI_Start() having the INOUT request; disallow that request to be altered.

Changes to the Text

Appropriate changes to Section 2.3, to the LIS for MPI_Start(), and explanations appropriate to same.

Impact on Implementations

NONE expected.

Impact on Users

NONE expected.

References and Pull Requests

Follow-on/duplicate of: #270

[tonyskjellum]

Per the persistent WG, @schulzm and I decided to open this ticket.