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/grep-2.4/mk/main.mk

@@ -0,0 +1,33 @@
+# SPDX-FileCopyrightText: 2021 Andrius Štikonas <andrius@stikonas.eu>
+# SPDX-FileCopyrightText: 2022 fosslinux <fosslinux@aussies.space>
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+PACKAGE=grep
+VERSION=2.4
+
+CC      = tcc
+LD      = tcc
+AR      = tcc -ar
+
+CFLAGS  = -DPACKAGE=\"$(PACKAGE)\" \
+          -DVERSION=\"$(VERSION)\" \
+          -DHAVE_DIRENT_H=1 \
+          -DHAVE_UNISTD_H=1 \
+          -DHAVE_STRERROR=1 \
+          -DREGEX_MALLOC=1
+
+.PHONY: all
+
+GREP_SRC = grep dfa kwset obstack regex stpcpy savedir getopt getopt1 search grepmat
+GREP_OBJECTS = $(addprefix src/, $(addsuffix .o, $(GREP_SRC)))
+
+all: grep
+
+grep: $(GREP_OBJECTS)
+	$(CC) $(CFLAGS) $^ $(LDFLAGS) -o $@
+
+install: all
+	install -D grep $(DESTDIR)$(PREFIX)/bin/grep
+	ln -sf $(PREFIX)/bin/grep $(DESTDIR)$(PREFIX)/bin/egrep
+	ln -sf $(PREFIX)/bin/grep $(DESTDIR)$(PREFIX)/bin/fgrep

steps/grep-2.4/sources

@@ -0,0 +1 @@
+https://mirrors.kernel.org/gnu/grep/grep-2.4.tar.gz a32032bab36208509466654df12f507600dfe0313feebbcd218c32a70bf72a16