sysutils/fusefs-rar2fs: Update to 1.27.1

While I'm here:

• Sort 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

PR: 235998
Submitted by: Niclas <n_carlsson@outlook.com> (maintainer)
Approved by: miwi (mentor)
Differential Revision: https://reviews.freebsd.org/D19333