This reverts commit 5d9bb41114544c9205a8b8f26642bad8231e8d4e.

* raimo/kernel/inet_ntoa_1-IPv6-lowercase/ERIERL-20/ERL-429/OTP-13006:
  Accept IPv6 address %suffixes when parsing
  Adjust inet:ntoa/1 to RFC5952, but not deeper
  Update inet:ntoa according to modern RFCs

This only implements decimal suffixes, and furthermore only with
a leading "0".  A complete implementation would probably allow one
and probably two digit suffixes without.

But what primarily is missing is translating interface names to
and from interface indexes.

This also only implements the parsing, and uses the FreeBSD trick of
squeezing in the Scope Id in the second 16-bit word of the fe80::/64
or ff02:/64 address prefix.  But inet_drv is not prepared to handle
this word, so it might only work on FreeBSD, not being supported even
there...  So inet_drv needs to handle this too.

There are a multitude of RFC:s that point to each other and some of them
suggest different addresses with IPv4 suffixes.  Use the IPv4 suffix
text representation only for the old well known ::a.b.c.d and
::ffff:a.b.c.d prefixes.  The others seems to be moving targets.

* lukas/erts/sendfile_sunos_fix/OTP-14424:
  erts: Fix sendfile closeduring scenario on sunos

On Solaris, giving a too long sfv_len results in an
EINVAL error, but data is still transmitted and len is
correctly. So we translate this to a success with that
amount of data sent. This may hide some other errors
that causes EINVAL, but it is the best we can do for now.

* lukas/erts/20_minor_fixes:
  kernel: Iterate for correct time in os_SUITE:perf_counter