Github user alopresto commented on the pull request:
https://github.com/apache/nifi/pull/256#issuecomment-220092091
Hi,
While I understand making `webhook` a sensitive value means it does not
"accompany" the template, it really is a sensitive value. Anyone with that URL
can post indiscriminately to the Slack channel it references. This is another
good example of where the upcoming [Variable
Registry](https://cwiki.apache.org/confluence/display/NIFI/Variable+Registry)
should be a helpful feature.
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