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2021-08-22T23:04:54.452061Z
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V 605
Escape any '.' characters in sysctl node names

ZFS creates some sysctl nodes that include a pool name, and '.' is an
allowed character in pool names.  But it's the separator in the sysctl
tree, so it can't be included in a sysctl name.  Replace it with "%25".
Handily, "%" is illegal in ZFS pool names, so there's no ambiguity
there.

PR:		257316
Sponsored by:	Axcient
Reviewed by:	freqlabs
Differential Revision: https://reviews.freebsd.org/D31265

(cherry picked from commit 6c9506559080da2914749bf611225d7c0a153609)

Git Hash:   98c467192082b3d4a6c91eeaa80868bb5231534c
Git Author: asomers@FreeBSD.org
END