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/autoconf-2.53/pass1.sh

@@ -0,0 +1,39 @@
+# SPDX-FileCopyrightText: 2021-2022 Andrius Štikonas <andrius@stikonas.eu>
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+src_prepare() {
+    default
+
+    rm -- Makefile.in */Makefile.in */*/Makefile.in aclocal.m4 configure
+    rm doc/standards.info doc/autoconf.info
+
+    # Do not use pregenerated manpages
+    sed -i '/SUBDIRS/s/ man//' Makefile.am
+
+    aclocal-1.6
+    cat config/m4.m4 >> aclocal.m4
+    autoconf-2.52
+    automake-1.6
+
+    # Not supported by autoconf-2.52
+    sed -i "s#@abs_top_builddir@#$PWD#" tests/wrappl.in
+    sed -i "s#@abs_top_srcdir@#$PWD#" tests/wrappl.in
+
+    # Install autoconf data files into versioned directory
+    for file in */*/Makefile.in */Makefile.in Makefile.in; do
+        sed -i '/^pkgdatadir/s:$:-@VERSION@:' "$file"
+    done
+}
+
+src_configure() {
+    ./configure --prefix="${PREFIX}" --program-suffix=-2.53
+}
+
+src_compile() {
+    make "${MAKEJOBS}" MAKEINFO=true DESTDIR="${DESTDIR}"
+}
+
+src_install() {
+    make install MAKEINFO=true DESTDIR="${DESTDIR}"
+}

steps/autoconf-2.53/patches/autoconf_252.patch

@@ -0,0 +1,42 @@
+SPDX-FileCopyrightText: 2021 Andrius Štikonas <andrius@stikonas.eu>
+SPDX-License-Identifier: GPL-3.0-or-later
+
+Disable features unsupported by Autoconf 2.52
+
+--- configure.ac	Wed Mar 17 19:53:06 2021
++++ configure.ac.new	Wed Mar 17 19:52:53 2021
+@@ -19,8 +19,7 @@
+ # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ # 02111-1307, USA.
+ 
+-# We need AC_CONFIG_TESTDIR.
+-AC_PREREQ([2.53])
++AC_PREREQ([2.52])
+ 
+ AC_INIT([GNU Autoconf], [2.53], [bug-autoconf@gnu.org])
+ AC_SUBST([PACKAGE_NAME])dnl
+@@ -32,7 +31,6 @@
+ AM_INIT_AUTOMAKE
+ 
+ # Initialize the test suite and build position independent wrappers.
+-AC_CONFIG_TESTDIR([tests])
+ AC_CONFIG_FILES([tests/Makefile tests/atlocal])
+ AC_CONFIG_FILES([tests/autoconf:tests/wrapsh.in],
+                 [chmod +x tests/autoconf])
+@@ -85,16 +73,4 @@
+                  bin/Makefile])
+ 
+ AC_OUTPUT
+-# Report the state of this version of Autoconf if this is a beta.
+-m4_bmatch(m4_defn([AC_PACKAGE_VERSION]),  [[a-z]],
+-[    cat <<EOF
+-
+-You are about to use an experimental version of Autoconf.  Be sure to
+-read the relevant mailing lists, most importantly <autoconf@gnu.org>.
+-
+-Below you will find information on the status of this version of Autoconf.
+-
+ 
+-EOF
+-    sed -n '/^\* Status/,$p' $srcdir/BUGS
+-])

steps/autoconf-2.53/sources

@@ -0,0 +1 @@
+https://mirrors.kernel.org/gnu/autoconf/autoconf-2.53.tar.bz2 6b217a064c6d06603d50a3ad05129aef9435367810c10894210b8dad965d2306