14.0 relnotes: more additions and cleanups

• Mention base64(1), bc/dc, tcpdump/libpcap, ncurses/terminfo, timerfd, kvm_clock.
• Add example for sleep(1).
• Catch up with Relnotes entries: freebsd-update file removal.
• Another version upgrade for OpenSSL.
• Add Azure entry in Cloud section
• Include kernel crypto additions.
• Note that kinst was ported to arm64 and riscv.
• Move vnode statistics item to Storage section
• Add UFS section with info about hardening.
• Add Other Storage section with msdosfs, synthetic file systems, and tarfs.
• Add placeholder for netlink.
• Address earlier comments on wording and markup from grahamperrin@gmail.com.

Reviewed by: carlavilla
Differential Revision: https://reviews.freebsd.org/D42431