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.

sysc/python-3.11.1/sources

@@ -1,24 +0,0 @@
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-http://ftp.unicode.org/Public/3.2-Update/UnicodeData-3.2.0.txt 5e444028b6e76d96f9dc509609c5e3222bf609056f35e5fcde7e6fb8a58cd446
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-http://ftp.unicode.org/Public/3.2-Update/LineBreak-3.2.0.txt d693ef2a603d07e20b769ef8ba29afca39765588a03e3196294e5be8638ca735
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-http://ftp.unicode.org/Public/3.2-Update/CaseFolding-3.2.0.txt 370f3d1e79a52791c42065946711f4eddb6d9820726afd0e436a3c50360475a9
-http://ftp.unicode.org/Public/3.2-Update/Unihan-3.2.0.zip 0582b888c4ebab6e3ce8d340c74788f1a68ca662713a1065b9a007f24bb4fe46
-http://ftp.unicode.org/Public/14.0.0/ucd/UnicodeData.txt 36018e68657fdcb3485f636630ffe8c8532e01c977703d2803f5b89d6c5feafb UnicodeData-14.0.0.txt
-http://ftp.unicode.org/Public/14.0.0/ucd/CompositionExclusions.txt 3360762fc3295cea54ab251c31df621d05ba4b94d46c60eaac29aa16d70ad1e0 CompositionExclusions-14.0.0.txt
-http://ftp.unicode.org/Public/14.0.0/ucd/EastAsianWidth.txt f901ac011aa32a09224d6555da71e2532c59c1d3381322829de0e3b880507250 EastAsianWidth-14.0.0.txt
-http://ftp.unicode.org/Public/14.0.0/ucd/DerivedCoreProperties.txt e3eddd7d469cd1b0feed7528defad1a1cc7c6a9ceb0ae4446a6d10921ed2e7bc DerivedCoreProperties-14.0.0.txt
-http://ftp.unicode.org/Public/14.0.0/ucd/DerivedNormalizationProps.txt b2c444c20730b097787fdf50bd7d6dd3fc5256ab8084f5b35b11c8776eca674c DerivedNormalizationProps-14.0.0.txt
-http://ftp.unicode.org/Public/14.0.0/ucd/LineBreak.txt 9e06e9f35c6959fb91dcc7993f90d58523c3079bc62c6b25f828b4cdebc5d70c LineBreak-14.0.0.txt
-http://ftp.unicode.org/Public/14.0.0/ucd/NameAliases.txt 14b3b677d33f95c51423dce6eef4a6a28b4b160451ecedee4b91edb6745cf4a3 NameAliases-14.0.0.txt
-http://ftp.unicode.org/Public/14.0.0/ucd/NamedSequences.txt db5745688affcdc0c3927a1ee0667018a96a7b24513f866d5235e98fef6c2436 NamedSequences-14.0.0.txt
-http://ftp.unicode.org/Public/14.0.0/ucd/SpecialCasing.txt c667b45908fd269af25fd55d2fc5bbc157fb1b77675936e25c513ce32e080334 SpecialCasing-14.0.0.txt
-http://ftp.unicode.org/Public/14.0.0/ucd/CaseFolding.txt a566cd48687b2cd897e02501118b2413c14ae86d318f9abbbba97feb84189f0f CaseFolding-14.0.0.txt
-http://ftp.unicode.org/Public/14.0.0/ucd/Unihan.zip 2ae4519b2b82cd4d15379c17e57bfb12c33c0f54da4977de03b2b04bcf11852d Unihan-14.0.0.zip
-http://ftp.unicode.org/Public/MAPPINGS/VENDORS/MICSFT/PC/CP437.TXT 6bad4dabcdf5940227c7d81fab130dcb18a77850b5d79de28b5dc4e047b0aaac
-https://www.ietf.org/rfc/rfc3454.txt eb722fa698fb7e8823b835d9fd263e4cdb8f1c7b0d234edf7f0e3bd2ccbb2c79
-http://mirror.math.princeton.edu/pub/openssl/source/old/1.1.1/openssl-1.1.1l.tar.gz 0b7a3e5e59c34827fe0c3a74b7ec8baef302b98fa80088d7f9153aa16fa76bd1