Change default thread stack size on command line

Description

We should be able to change the default stack thread size via a -X: command
line argument. Baking this in as a build-time constant is silly...there is
no performance advantage to making it a build time constant.

See SF: https://sourceforge.net/tracker/index.php?func=detail&aid=1147485&group_id=128805&atid=712771

Environment

None

Status

Assignee

DaveG

Reporter

DaveG

Labels

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Fix versions

Priority

Low
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