Update to 3.0-1822-ge8f0d3e

• Manpage updates
• Remove pkg_install support.
• Remove NO_STAGE support.
• Remove use of umount -f where possible.
• Use relative paths where possible to avoid namecache contention.
• USE_CACHED reworked to use POSIX mq (will soon change again)
• PRIORITY_BOOST is fixed to boost dependencies as well now with USE_PTSORT enabled (default yes).
• Load linux64 when needed
• Improved ports_env support (less executions during ports interations)
• Show resource limits in build log
• Limit filedescriptors to 1024 by default with MAX_FILES
• Shutdown/unmount build jails in parallel
• Don't leak mount path in build log from ident(1)
• sh: Add some builtins to avoid fork/execs (mostly poudriere C helpers): cachec, clock_monotonic, date +%s, dirempty, locked_mkdir, realpath, sleep
• BUILD_AS_NON_ROOT: Remove redundant chown -R.
• Add HTML_JSON_UPDATE_INTERVAL (def: 2) to allow overriding JSON update interval.
• Add support for USE_TMPFS=no
• jail: install the kernel requested with -K when using src method
• jail -c -m src: Add support for building the src tree with -b.
• jail -u -m src: Update the version for the jail as well.
• jail -c: Allow @rev for releng/X.Y branch
• jail: Switch to http protocol for ftp-archive.
• ports: Do not create a FS when '-m none'
• ports -d: Do not delete a ports tree created with method=none or -.
• ports -d: Confirm if in a TTY
• ports -d: Really delete the zfs dataset when TMPFS_ALL is used
• ports: Add git+http support
• ports/jail: Auto pass PROXY env vars from parent environment
• image: only isos have a restriction in the image name
• image: If the images dir does not exist, attempt to create it
• image: Handle a relative path with -o
• image: Various fixes.
• image: usb|*firmware|rawdisk now require a kernel and image size.
• testport: Fix fdescfs/procfs/linprocfs not being mounted.
• testport: Fix limits not being applied
• testport+SIGINFO: Fix very old deadlock with update_stats.
• pkgclean: Add hook: pkgclean done <DELETED_FILES: 0|1> <BUILT_REPO: 0|1>
• pkgclean: Cleanup corrupt packages
• pkgclean: Act on .latest directory for ATOMIC_PACKAGE_REPOSITORY
• poudriere.conf: Don't suggest changing svn.FreeBSD.org to a mirror anymore.
• QEMU+Arm64: Coppy the latest aarch64-binutils ld into the jail at startup.
• QEMU+Arm64: Link /usr/bin/ld to /nxb-bin/usr/bin/ld.
• QEMU+Arm64: Tell about copying ld
• QEMU+Arm64: Note that this is not working properly yet due to the aarch64-binutils port not providing a static ld.
• options: Properly setup ARCH/MACHINE in make.conf for cross-builds