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/checksum-transcriber-1.0/checksum-transcriber-1.0.amd64.checksums

@@ -0,0 +1 @@
+4d1a7b8a0e42f278df20893610dd37dec62b609c2c342d9252917907e4d73c03  /usr/bin/checksum-transcriber

steps/checksum-transcriber-1.0/checksum-transcriber-1.0.riscv64.checksums

@@ -0,0 +1 @@
+b6145df4b2a92d5ee75902f4367e7a1a5456a5cef7a2e1365610637b054c477a  /usr/bin/checksum-transcriber

steps/checksum-transcriber-1.0/checksum-transcriber-1.0.x86.checksums

@@ -0,0 +1 @@
+216fe50dd8e70928f382d40ced1d9a2c167f7a5aafd555901194c5559af8c526  /usr/bin/checksum-transcriber

steps/checksum-transcriber-1.0/pass1.kaem

@@ -0,0 +1,20 @@
+#!/bin/sh
+
+# SPDX-FileCopyrightText: 2023 fosslinux <fosslinux@aussies.space>
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+set -ex
+
+# Build & install
+M2-Mesoplanet --architecture ${ARCH} -f src/checksum-transcriber.c -o ${BINDIR}/checksum-transcriber
+
+# Checksums
+if match x${UPDATE_CHECKSUMS} xTrue; then
+    sha256sum -o ${pkg}.${ARCH}.checksums \
+        /usr/bin/checksum-transcriber
+
+    cp ${pkg}.${ARCH}.checksums ${SRCDIR}
+else
+    sha256sum -c ${pkg}.${ARCH}.checksums
+fi

steps/checksum-transcriber-1.0/src/checksum-transcriber.c

@@ -0,0 +1,90 @@
+/*
+ * SPDX-FileCopyrightText: 2022 fosslinux <fosslinux@aussies.space>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <bootstrappable.h>
+#include <unistd.h>
+
+#define MAX_STRING 4096
+#define MAX_TOKENS 3
+
+char *get_distfiles(char **envp) {
+	char *envvar = "DISTFILES=";
+	int i = 0;
+	while (envp[i] != NULL && strncmp(envp[i], envvar, strlen(envvar)) != 0) i += 1;
+	// Now we have distfiles= - get just the part we want.
+	require(envp[i] != NULL, "Unable to find distfiles environment variable");
+	return envp[i] + strlen(envvar);
+}
+
+int main(int argc, char **argv, char **envp) {
+	// Random file things
+	require(argc == 2, "Usage: checksum-transcriber FILENAME");
+	char *input = argv[1];
+	FILE *in = fopen(input, "r");
+	require(in != NULL, "File does not exist");
+	char *output = calloc(MAX_STRING, sizeof(char));
+	require(strcpy(output, input) != NULL, "Failed copying string");
+	require(strcat(output, ".SHA256SUM") != NULL, "Failed concating string");
+	FILE *out = fopen(output, "w+");
+	require(out != NULL, "Failed opening output file");
+
+	char *orig_line;
+	char *line = calloc(MAX_STRING, sizeof(char));
+	require(line != NULL, "Failed allocating string");
+	char **tokens;
+	char *new_line;
+	char *checksum;
+	char *filename;
+	int i;
+	fgets(line, MAX_STRING, in);
+	while (strlen(line) != 0) {
+		// Split each line into tokens
+		orig_line = line;
+		tokens = calloc(MAX_TOKENS, sizeof(char*));
+		i = 0;
+		while (i < MAX_TOKENS) {
+			tokens[i] = line;
+			new_line = strchr(line, ' ');
+			// Occurs when there are only two tokens
+			if (new_line == NULL) break;
+			line = new_line;
+			line[0] = '\0';
+			line += 1;
+			i += 1;
+		}
+		line = strchr(line, '\n');
+		line[0] = '\0';
+		// Get checksum and filename
+		checksum = tokens[1];
+		if (tokens[2] != NULL) {
+			filename = tokens[2];
+		} else {
+			filename = strrchr(tokens[0], '/');
+			filename += 1;
+		}
+		// Put it all together
+		fputs(checksum, out);
+		fputs("  ", out);
+		fputs(get_distfiles(envp), out);
+		fputc('/', out);
+		fputs(filename, out);
+		fputc('\n', out);
+		// Cleanup
+		i = 0;
+		free(orig_line);
+		free(tokens);
+		line = calloc(MAX_STRING, sizeof(char));
+		require(line != NULL, "Failed allocating string");
+		fgets(line, MAX_STRING, in);
+	}
+
+	// Clean up
+	fclose(in);
+	fclose(out);
+}