nitpicks
Correct 5.20 regression: '"X" !~ /[x]/i'

This problem occurs only when the pattern is UTF-8, contains a single ASCII
lowercase letter.  It does not match its uppercase counterpart.

For RT #122655

[Note from committer: This is a manual back-port of b6e093f25d
by James E Keenan <jkeen@verizon.net>.]
perldelta - Update acknowledgements
5.20.1-RC2 today

(cherry picked from commit 2f2cb2442a9510a2ca843089a5ac006c75faa4f0)
Bump version to RC2
Porting/makemeta update
Disarm the patchlevel.h change
Porting/makemeta update
Add epigraph for 5.20.1-RC2

(cherry picked from commit d1da2d574bc16ae8003d2c8b558ad288d64e0d5d)
Perl 5.20.1 today

(cherry picked from commit 096a768b1f2a71de66bba2cd586532bc7da49b12)
Perl 5.20.1 today

(cherry picked from commit b751404f15c4361b6daf9c62a4a821f642bb6869)
perldelta - Finalize acknowledgements
Create new perldelta for 5.20.2
sig() should be kill()

There is no sig() function, and the block of text has similar language
to a previous block which uses kill().

For: RT #122662
(cherry picked from commit 9589aa831c3533d85bf7042e049cbe02095df9d3)
Doug Bell is now a Perl 5 author.

(cherry picked from commit 77d4f3e3169844a5ec8eca10503e66edae15d74e)