Github user shroman commented on the issue:
https://github.com/apache/incubator-rocketmq/pull/87
@dongeforever Sorry, I don't think this modification is needed. A user will
modify this file anyway in order to match his/her system requirements.
Also, there are even more flags, and if you take this approach, you may
have to add more variables for each in future, which will make the script
tricky.
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