sysutils/fusefs-rar2fs: Update to 1.27.1

[kai]

Summary

PR 235998

While I'm here:

• Sorted variables a bit according to the PHB
• Pet portlint

Changelog:

• Add mutex lock to protect reads in raw mode
• Fix a heap-use-after-free error
• Add a missing lock when resolving a link target

Test Plan

• poudriere (11.2-, 12.0-RELEASE, 13.0-CURRENT@r344112 amd64 + i386) -> OK
• portlint -> OK
• Runtime tests -> OK

[miwi]

LGTM