man*/, man-pages.7: VERSIONS, STANDARDS, HISTORY: Reorganize sections

man*/, man-pages.7: VERSIONS, STANDARDS, HISTORY: Reorganize sections

-  Add a new HISTORY section that covers the history of an API, both
   regarding implementations and regarding old standards.  This was
   previously covered in VERSIONS, and in some cases in STANDARDS.

-  Repurpose VERSIONS to cover differing implementations in _current_
   systems.

-  STANDARDS is reduced to only cover current versions of standards.
   That basically means only C11 (C99 has been superseeded by C11; C17
   is just a bugfix of C11, so not really a new version), and
   POSIX.1-2008 (*-2001 was superseeded by *-2008; *-2017 was just a
   bugfix for *-2008).  The section also mentions for example 'Linux',
   'GNU' or 'BSD' when a non-standard API is Linux- or GNU-only or if
   it's (de-facto) standard in the BSDs.

-  In some cases content that should go into one of these sections was
   in NOTES.  Move it from there to where it corresponds.

-  In the SYNOPSIS, I added [[deprecated]] in some functions that I
   found are deprecated by the relevant standards.

-  A few other related changes...

Cc: Oskari Pirhonen <xxc3ncoredxx@gmail.com>
Signed-off-by: Alejandro Colomar <alx@kernel.org>