[Perl/perl5] 8ced14: Sync Encode version 3.06 into blead

[Dan Kogai]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: 8ced1423dbb2a874f2d95e9c5c4c46960c2bf318
      
https://github.com/Perl/perl5/commit/8ced1423dbb2a874f2d95e9c5c4c46960c2bf318
  Author: Dan Kogai <danko...@dan.co.jp>
  Date:   2020-05-02 (Sat, 02 May 2020)

  Changed paths:
    M Porting/Maintainers.pl
    M cpan/Encode/Encode.pm
    M cpan/Encode/bin/enc2xs
    M cpan/Encode/encoding.pm
    M cpan/Encode/lib/Encode/Guess.pm

  Log Message:
  -----------
  Sync Encode version 3.06 into blead

Pumpking okayed merge during code freeze.  This addresses:
https://rt.cpan.org/Ticket/Display.html?id=132471