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/bash-2.05b/mk/main.mk

@@ -0,0 +1,92 @@
+# SPDX-FileCopyrightText: 2021 Andrius Štikonas <andrius@stikonas.eu>
+# SPDX-FileCopyrightText: 2021 fosslinux <fosslinux@aussies.space>
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+include common.mk
+
+CFLAGS  = \
+		  -I. \
+		  -Iinclude \
+		  -Ilib \
+		  -Ilib/sh \
+		  -Ibuiltins \
+		  $(COMMON_CFLAGS)
+
+LDFLAGS   = -L. -Lbuiltins -static
+LIBRARIES = libsh.a builtins/libbuiltins.a libglob.a libtilde.a
+
+SHLIB_FILES = clktck getcwd getenv oslib setlinebuf strcasecmp strerror strtod \
+	vprint itos rename zread zwrite shtty inet_aton netopen \
+	strpbrk timeval clock makepath pathcanon pathphys stringlist stringvec \
+	tmpfile spell strtrans strindex shquote snprintf mailstat fmtulong \
+	fmtullong strtoll strtoull strtoimax strtoumax fmtumax netconn mktime \
+	strftime xstrchr zcatfd
+# FIXME: for some reason these don't get picked up correctly in the
+# final linking cmd
+SHLIB_ODD_FILES = zcatfd strtoumax spell pathphys
+SHLIB_OBJS = $(addprefix lib/sh/, $(addsuffix .o, $(SHLIB_FILES)))
+SHLIB_ODD_OBJS = $(addprefix lib/sh/, $(addsuffix .o, $(SHLIB_ODD_FILES)))
+
+MKBUILTINS_OBJS = builtins/mkbuiltins.o
+BUILTINS_DEFS = $(addprefix builtins/, $(addsuffix .def, $(BUILTINS_DEF_FILES)))
+
+GLOB_FILES = glob strmatch smatch xmbsrtowcs
+GLOB_OBJS = $(addprefix lib/glob/, $(addsuffix .o, $(GLOB_FILES)))
+
+TILDE_OBJS = lib/tilde/tilde.o
+
+MKSYNTAX_OBJS = mksyntax.o
+MKSIGNAMES_OBJS = support/mksignames.o
+
+FILES = shell eval y.tab general make_cmd print_cmd dispose_cmd execute_cmd \
+	variables copy_cmd error expr flags nojobs subst hashcmd hashlib mailcheck \
+	trap input unwind_prot pathexp sig test version alias array arrayfunc \
+	braces bracecomp bashhist bashline list stringlib locale findcmd redir \
+	pcomplete pcomplib syntax xmalloc siglist
+OBJS = $(addsuffix .o, $(FILES))
+
+all: bash
+
+# Builtins
+
+mkbuiltins: $(MKBUILTINS_OBJS)
+	$(CC) $(CFLAGS) $(MKBUILTINS_OBJS) $(LDFLAGS) -o $@
+	./mkbuiltins -externfile builtins/builtext.h -structfile builtins/builtins.c -noproduction $(BUILTINS_DEFS)
+
+# libsh
+
+libsh.a: $(SHLIB_OBJS)
+	$(AR) cr $@ $^
+
+# libglob
+
+libglob.a: $(GLOB_OBJS)
+	$(AR) cr $@ $^
+
+# libtilde
+
+libtilde.a: $(TILDE_OBJS)
+	$(AR) cr $@ $^
+
+# The actual program
+
+mksyntax: $(MKSYNTAX_OBJS)
+	$(CC) $^ $(LDFLAGS) -o $@ -lgetopt
+
+syntax.c: mksyntax
+	./mksyntax -o $@
+
+mksignames: $(MKSIGNAMES_OBJS)
+	$(CC) $^ $(LDFLAGS) -o $@ -lgetopt
+
+signames.h: mksignames
+	./mksignames $@
+
+y.tab.c: parse.y
+	yacc -d $^
+
+trap.c: signames.h
+
+bash: libsh.a libglob.a libtilde.a $(OBJS)
+	$(CC) -o bash $(LIBRARIES) $(OBJS) $(SHLIB_ODD_OBJS) $(LDFLAGS) -lsh -lbuiltins -lglob -ltilde