Remove the term "on-line" (meaning "Info") throughout, since

Remove the term "on-line" (meaning "Info") throughout, since
in this day and age the common meaning is "on the web".
(copying): Use @copyright in all cases.
(Basic keys): Remove reference to deleted manual node "Text Characters".
(File-name conventions): Use GNU as an example rather than SERVICE.
default.el lives in site-lisp.  Update Info directory location.
(Real meaning of copyleft): GPL actions have been brought, but all
settled out of court.
(Guidelines for newsgroup postings): Shorten section title.
Simplify comp.emacs description.
(Newsgroup archives): Change Google URL.  Describe Gmane.
(Unsubscribing from Emacs lists): Remove discussion of "distribution
points".  Mention List-Unsubscribe header.
(Contacting the FSF): Update email and URLs.
(Basic editing): Mention F1 for help.
(Installing Texinfo documentation): Refer to Texinfo website rather
than ftp server.
(Printing a Texinfo file): Mention texi2pdf.
(Informational files for Emacs): Don't describe FTP or SERVICE, they
are just stubs nowadays.
(Latest version of Emacs): Explain version numbers.
(Spell-checkers, Checking TeX and *roff documents): Remove sections.
(Turning on syntax highlighting): No need to mention hilit19 any more.
(Finding Emacs on the Internet): Refer to URLs rather than DISTRIB, FTP.
(Modes for various languages): Remove section.
(Major packages and programs): Remove most version and maintainer
information - it's hard to keep up-to-date, and adds nothing.
Similarly with direct links to mailing lists.
(Spell-checkers): Rename node from Ispell.  Mention Aspell and Hunspell.
(Mailcrypt): Remove section - mailcrypt has not been updated in mnay
years, and Emacs comes with tools for this now.
(Patch): Remove section - this is a standard tool.
(Using function keys under X): Remove section.