Move setting toolchain vars to cross-tools

So that once you have built a toolchain, you can always go back to the
"Building the CLFS System" section, delete your targetfs dir, and start
over building for a target, again.
fstab: Just a root line

The bootscripts will take care of all the tmpfs-like file systems.
bootscripts: No symlink needed

init will find the startup and shutdown scripts via the configuration
given in inittab.
Remove e2fsprogs and beyond-filesys section

busybox has some e2fsprog abilities.  e2fsprogs uses some glibc-isms
which are annoying to patch correctly.  Most people won't use the
e2fsprogs actual package as busybox versions can do fsck.
zlib: Set optimization in CFLAGS

No need to alter configure, it'll respect CFLAGS.
Add netplug to beyond-net

Not yet supported by bootscripts although instructions are in this
commit.
Rename musl-libc to just musl

Proper name seems to be just "musl" from the documentation.
cflags: Don't deal with CXXFLAGS

We don't build c++ compiler and thus CXXFLAGS should not be used.
gcc: Add notes for static vs final builds

To clarify that the first pass is mainly to build the libc and the
second pass uses that libc to build the actual cross compiler.
kernel: s/simplify/reduce complexity of booting/

As per recommendation of nu shto.
Update binutils to 2.24

Now supports musl without patching of binutils.
Update busybox to version 1.22.1

Removes the need to patch busybox due to musl.
Update musl to version 1.0.3

Latest stable series version.
Rename "beyond-introduction" directory to "beyond"

Will support combining every beyond package into one section.
Remove iptables

I have not tested even building iptables since late 2011 and no one else
has stepped up to support determining if it builds or functions.
beyond/intro: Clarify wording

We will not configure busybox, it's done already.
Only networking packages are in beyond, now.
Move all beyond packages into single beyond section

There's only a few now, putting them all together makes sense.
the-end: Move boot info to theend

Both were small sections, should just be 1 page.
Update changelog
Update date