Add support for a "comment" parameter to the aggregate command

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    • Fully Compatible
    • v3.4
    • Query 2017-03-27
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      In order to help users trace output in the logs, the system.profile collection, and db.currentOp() back to their application behavior, we should extend the aggregation command to accept a comment parameter:

      db.runCommand({aggregate: "myCollection", pipeline: [{$match: "foo"}], comment: "fooMatch"});

      We should require at command parsing time that the comment is a string. Its diagnostic display in the logs/profile/currentOp should be consistent with that for the find command's comment parameter, documented here.

            Assignee:
            Bernard Gorman
            Reporter:
            David Storch
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