FreeBSD_HEAD_arm64 - Build #3301 - Fixed

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FreeBSD_HEAD_arm64 - Build #3301 - Fixed:

Build information: https://jenkins.FreeBSD.org/job/FreeBSD_HEAD_arm64/3301/
Full change log: https://jenkins.FreeBSD.org/job/FreeBSD_HEAD_arm64/3301/changes
Full build log: https://jenkins.FreeBSD.org/job/FreeBSD_HEAD_arm64/3301/console

Change summaries:

301185 by allanjude:
Address feedback from hrs@ re: r301059 (ifconfig subnet mask)

- Use NI_MAXHOST to size buffers for getnameinfo()
- remove non-standard 'full' inet6 address printing
- remove 'no scope' option
- use strchr(3) to optimize replacing separator character in lladdrs

Reviewed by:	gnn, jhb
Differential Revision:	https://reviews.freebsd.org/D2856

301182 by gnn:
Fix kernel build.  Improper definition location of a variable.