John Baldwin b64b636d46 Use a dynamic buffer for the copy of a node's new value.
This permits setting a node's value to a string longer than BUFSIZ.

Reported by:	Sony Arpita Das @ Chelsio
Reviewed by:	freqlabs
MFC after:	1 week
Sponsored by:	Chelsio Communications
Differential Revision:	https://reviews.freebsd.org/D27027
2020-10-30 21:13:05 +00:00
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