Multi-name option mapping to the same one

Registered by Laurence Miao on 2012-11-15

option names like --foo-bar, --foo_bar and --foobar, can be assigned to the same dest 'foo-bar', so that, deprecated * option names can co-exists with new name till the later one got flourished.

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Status:
Not started
Approver:
None
Priority:
Undefined
Drafter:
None
Direction:
Needs approval
Assignee:
None
Definition:
New
Series goal:
None
Implementation:
Unknown
Milestone target:
None

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