Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

release: increase IMAGE_SIZE for arm, arm64, riscv

Related to: PR 264032
MFC after: 5 minutes
Sponsored by: Rubicon Communications, LLC ("Netgate")

release: permanently remove the 'reldoc' target and associates

Following 7b1d1a1658ffb69eff93afc713f9e88ed8b20eac, the structure
for the reldoc target has significantly changed as result of the
ASCIIDoctor/Hugo migration. As the release notes related files
on the installation medium are inherently out of date, purge them
entirely.

Discussed within: re, doceng
No objection: re (silence), doceng (silence)
Timeout: 2 weeks
MFC after: 1 week
MFC to: stable/13, stable/12, and stable/11 only
Sponsored by: Rubicon Communications, LLC ("Netgate")

release: ROCKPRO64: Remove the quirk that disable the big cores

It's not needed anymore.

release: arm64: rockpro64: Set hw.ncpu to 4

Since there is known issue with big.LITTLE set the number of CPU to 4
which is the number present in the LITTLE cluster.

Add PINE64 ROCKPro64 config for generation of release images

Submitted by: Daniel Engberg
Reviewed by: imp
Differential Revision: https://reviews.freebsd.org/D22538