mcp-negotiate min-version: 1.0 ???

[Erik Ostrom <eostrom@research.att.com>]

>Because I don't know what version 1.0 of m-n looks like.

>From the end of section 3.1:

| The preceding discussion describes version 2.0 of the mcp-negotiate
| package, but only version 1.0 of the package is required for MCP 2.1
| compliance. There are two differences between version 1.0 and version
| 2.0 of the mcp-negotiate package:
|
|   * In version 2.0, an mcp-negotiate-can message is sent for the
|     mcp-negotiate package. No such message is sent for version
|     1.0. Support for it is implicit. 
|   * Version 1.0 has no mcp-negotiate-end message.