creatingdirs: Reduce number of dirs made to minimum

Not fully FHS compliant but no one really cares about FHS any more
anyway.
creatingfiles: Reduce users and groups to minimum
creatingbuilddir: Fix permissions wording

Ensure ${CLFS} has permissions that are *NOT* too restrictive.
Fix iana-etc patch and 'make get'

Use Arch Linux patch.
Downcase iana-etc name

It's written all downcase on the iana-etc website.
libc: Fix musl configure and install

Configure should use a --prefix of / such that libs install into /lib
within the sysroot.  make install needs DESTDIR in order to install into
the sysroot, too.
libc: Remove --enable-debug

Not needed.
general.ent: Update date