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/dhcpcd-10.0.1/patches/remove-ctassert.patch

@@ -0,0 +1,134 @@
+# SPDX-FileCopyrightText: 2022 fosslinux <fosslinux@aussies.space>
+#
+# SPDX-License-Identifier: BSD-2-Clause
+
+__CTASSERT macro does not work properly on our older GCC.
+
+diff -ru src/arp.c src/arp.c
+--- src/arp.c
++++ src/arp.c
+@@ -63,9 +63,6 @@
+ /* ARP debugging can be quite noisy. Enable this for more noise! */
+ //#define	ARP_DEBUG
+ 
+-/* Assert the correct structure size for on wire */
+-__CTASSERT(sizeof(struct arphdr) == 8);
+-
+ static ssize_t
+ arp_request(const struct arp_state *astate,
+     const struct in_addr *sip)
+diff -ru src/auth.c src/auth.c
+--- src/auth.c
++++ src/auth.c
+@@ -343,9 +343,6 @@
+ 
+ 	/* RFC3318, section 5.2 - zero giaddr and hops */
+ 	if (mp == 4) {
+-		/* Assert the bootp structure is correct size. */
+-		__CTASSERT(sizeof(struct bootp) == 300);
+-
+ 		*(mm + offsetof(struct bootp, hops)) = '\0';
+ 		memset(mm + offsetof(struct bootp, giaddr), 0, 4);
+ 	}
+diff -ru src/dhcp6.c src/dhcp6.c
+--- src/dhcp6.c
++++ src/dhcp6.c
+@@ -84,33 +84,28 @@
+ 	uint8_t xid[3];
+ 	/* followed by options */
+ };
+-__CTASSERT(sizeof(struct dhcp6_message) == 4);
+ 
+ struct dhcp6_option {
+ 	uint16_t code;
+ 	uint16_t len;
+ 	/* followed by data */
+ };
+-__CTASSERT(sizeof(struct dhcp6_option) == 4);
+ 
+ struct dhcp6_ia_na {
+ 	uint8_t iaid[4];
+ 	uint32_t t1;
+ 	uint32_t t2;
+ };
+-__CTASSERT(sizeof(struct dhcp6_ia_na) == 12);
+ 
+ struct dhcp6_ia_ta {
+ 	uint8_t iaid[4];
+ };
+-__CTASSERT(sizeof(struct dhcp6_ia_ta) == 4);
+ 
+ struct dhcp6_ia_addr {
+ 	struct in6_addr addr;
+ 	uint32_t pltime;
+ 	uint32_t vltime;
+ };
+-__CTASSERT(sizeof(struct dhcp6_ia_addr) == 16 + 8);
+ 
+ /* XXX FIXME: This is the only packed structure and it does not align.
+  * Maybe manually decode it? */
+@@ -120,7 +115,6 @@
+ 	uint8_t prefix_len;
+ 	struct in6_addr prefix;
+ } __packed;
+-__CTASSERT(sizeof(struct dhcp6_pd_addr) == 8 + 1 + 16);
+ 
+ struct dhcp6_op {
+ 	uint16_t type;
+diff -ru src/dhcp.c src/dhcp.c
+--- src/dhcp.c
++++ src/dhcp.c
+@@ -98,11 +98,6 @@
+ #define IP_RECVPKTINFO IP_PKTINFO
+ #endif
+ 
+-/* Assert the correct structure size for on wire */
+-__CTASSERT(sizeof(struct ip)		== 20);
+-__CTASSERT(sizeof(struct udphdr)	== 8);
+-__CTASSERT(sizeof(struct bootp)		== 300);
+-
+ struct dhcp_op {
+ 	uint8_t value;
+ 	const char *name;
+diff -ru src/if-bsd.c src/if-bsd.c
+--- src/if-bsd.c
++++ src/if-bsd.c
+@@ -1600,7 +1600,6 @@
+ #endif
+ }
+ 
+-__CTASSERT(offsetof(struct rt_msghdr, rtm_msglen) == 0);
+ int
+ if_handlelink(struct dhcpcd_ctx *ctx)
+ {
+diff -ru src/ipv6nd.c src/ipv6nd.c
+--- src/ipv6nd.c
++++ src/ipv6nd.c
+@@ -80,7 +80,6 @@
+ 	uint32_t	nd_opt_rdnss_lifetime;
+         /* followed by list of IP prefixes */
+ };
+-__CTASSERT(sizeof(struct nd_opt_rdnss) == 8);
+ #endif
+ 
+ #ifndef ND_OPT_DNSSL
+@@ -92,7 +91,6 @@
+ 	uint32_t	nd_opt_dnssl_lifetime;
+ 	/* followed by list of DNS servers */
+ };
+-__CTASSERT(sizeof(struct nd_opt_dnssl) == 8);
+ #endif
+ 
+ /* Impossible options, so we can easily add extras */
+diff -ru src/privsep-root.c src/privsep-root.c
+--- src/privsep-root.c
++++ src/privsep-root.c
+@@ -56,8 +56,6 @@
+ #include "sa.h"
+ #include "script.h"
+ 
+-__CTASSERT(sizeof(ioctl_request_t) <= sizeof(unsigned long));
+-
+ struct psr_error
+ {
+ 	ssize_t psr_result;