cap_net: correct capability name from addr2name to name2addr

cap_net: correct capability name from addr2name to name2addr

Previously, while checking name2addr capabilities, we mistakenly used
the addr2name set. This error could cause a process to inadvertently
reset its limitations.

Reported by:	Shawn Webb <shawn.webb@hardenedbsd.org>

(cherry picked from commit afd74c400075d94e01dd3430844bb290834660ef)
(cherry picked from commit 765757c6301fa41c0b59108347c600fbc9020c39)
(cherry picked from commit 114c6d9bef765a47ebcb8e65d1c935cbcbe51002)

Approved by:	so
Approved by:	re (implicit)
Security:	SA-23:16.cap_net
Sponsored by:	The FreeBSD Foundation