Remove the notion of "sys*"

- This idea originates from very early in the project and was, at the
  time, a very easy way to categorise things.
- Now, it doesn't really make much sense - it is fairly arbitary, often
  occuring when there is a change in kernel, but not from builder-hex0
  to fiwix, and sysb is in reality completely unnecessary.
- In short, the sys* stuff is a bit of a mess that makes the project
  more difficult to understand.
- This puts everything down into one folder and has a manifest file that
  is used to generate the build scripts on the fly rather than using
  coded scripts.
- This is created in the "seed" stage.

stage0-posix -- (calls) --> seed -- (generates) --> main steps

Alongside this change there are a variety of other smaller fixups to the
general structure of the live-bootstrap rootfs.

- Creating a rootfs has become much simpler and is defined as code in
  go.sh. The new structure, for an about-to-be booted system, is

/
-- /steps (direct copy of steps/)
-- /distfiles (direct copy of distfiles/)
-- all files from seed/*
-- all files from seed/stage0-posix/*

- There is no longer such a thing as /usr/include/musl, this didn't
  really make any sense, as musl is the final libc used. Rather, to
  separate musl and mes, we have /usr/include/mes, which is much easier
  to work with.
- This also makes mes easier to blow away later.
- A few things that weren't properly in packages have been changed;
  checksum-transcriber, simple-patch, kexec-fiwix have all been given
  fully qualified package names.
- Highly breaking change, scripts now exist in their package directory
  but NOT WITH THE packagename.sh. Rather, they use pass1.sh, pass2.sh,
  etc. This avoids manual definition of passes.
  - Ditto with patches; default directory is patches, but then any patch
    series specific to a pass are named patches-passX.

steps/sed-4.8/import-gnulib.sh

@@ -0,0 +1,66 @@
+#!/bin/sh
+
+# SPDX-FileCopyrightText: 2022 Andrius Štikonas <andrius@stikonas.eu>
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+../gnulib-d279bc/gnulib-tool --import --local-dir=gl \
+  --lib=libsed \
+  --source-base=lib \
+  --m4-base=m4 \
+  --doc-base=doc \
+  --tests-base=gnulib-tests \
+  --aux-dir=build-aux \
+  --with-tests \
+  --makefile-name=gnulib.mk \
+  --no-conditional-dependencies \
+  --no-libtool \
+  --macro-prefix=gl \
+  --avoid=lock-tests \
+  acl \
+  alloca \
+  binary-io \
+  btowc \
+  c-ctype \
+  closeout \
+  dfa \
+  extensions \
+  fdl \
+  fwriting \
+  getdelim \
+  getopt \
+  gettext-h \
+  git-version-gen \
+  gitlog-to-changelog \
+  ignore-value \
+  localcharset \
+  manywarnings \
+  mbrlen \
+  mbrtowc \
+  mbsinit \
+  memchr \
+  memrchr \
+  mkostemp \
+  non-recursive-gnulib-prefix-hack \
+  obstack \
+  perl \
+  progname \
+  readme-release \
+  regex \
+  rename \
+  selinux-h \
+  ssize_t \
+  stat-macros \
+  stdalign \
+  stdbool \
+  strerror \
+  strverscmp \
+  unlocked-io \
+  update-copyright \
+  verify \
+  version-etc-fsf \
+  wcrtomb \
+  wctob \
+  xalloc
+
+./build-aux/prefix-gnulib-mk --lib-name=libsed lib/gnulib.mk

steps/sed-4.8/pass1.sh

@@ -0,0 +1,20 @@
+# SPDX-FileCopyrightText: 2022 Andrius Štikonas <andrius@stikonas.eu>
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+src_prepare() {
+    rm configure
+    find . -name 'Makefile.in' -delete
+
+    ../../import-gnulib.sh
+
+    autoreconf-2.69 -fi
+}
+
+src_configure() {
+    GL_GENERATE_ALLOCA_H_TRUE=0 LDFLAGS="-static" ./configure --prefix="${PREFIX}"
+}
+
+src_install() {
+    default
+}

steps/sed-4.8/sources

@@ -0,0 +1,2 @@
+https://mirrors.kernel.org/gnu/sed/sed-4.8.tar.xz f79b0cfea71b37a8eeec8490db6c5f7ae7719c35587f21edb0617f370eeff633
+http://git.savannah.gnu.org/cgit/gnulib.git/snapshot/gnulib-d279bc.tar.gz 12cfa21abf618a274017d6b18e95fc6582519d7c08e2403e5c5772ccdd5b85f4