update authors/contributors list

these additions were made by scanning git log since the last major
update in commit 1366b3c5e6.

as before my aim was adding everyone with either substantial code
contributions or a pattern of ongoing simple patch submission; any
omissions are unintentional.

COPYRIGHT

@@ -27,11 +27,15 @@ Authors/contributors include:
 
 A. Wilcox
 Alex Dowad
+Alex Suykov
 Alexander Monakov
+Andre McCurdy
 Andrew Kelley
 Anthony G. Basile
+Aric Belsito
 Arvid Picciani
 Bartosz Brachaczek
+Benjamin Peterson
 Bobby Bingham
 Boris Brezillon
 Brent Cook
@@ -40,11 +44,14 @@ Clément Vasseur
 Daniel Micay
 Daniel Sabogal
 Daurnimator
+David Carlier
 David Edelsohn
 Denys Vlasenko
 Dmitry Ivanov
 Dmitry V. Levin
+Drew DeVault
 Emil Renner Berthing
+Fangrui Song
 Felix Fietkau
 Felix Janda
 Gianluca Anzolin
@@ -61,6 +68,7 @@ John Spencer
 Josiah Worcester
 Julien Ramseier
 Justin Cormack
+Kaarle Ritvanen
 Khem Raj
 Kylie McClain
 Leah Neukirchen
@@ -68,28 +76,35 @@ Luca Barbato
 Luka Perkov
 M Farkas-Dyck (Strake)
 Mahesh Bodapati
+Markus Wichmann
 Masanori Ogino
+Michael Clark
 Michael Forney
 Mikhail Kremnyov
 Natanael Copa
 Nicholas J. Kain
 orc
 Pascal Cuoq
+Patrick Oppenlander
 Petr Hosek
 Petr Skocik
 Pierre Carrier
 Reini Urban
 Rich Felker
 Richard Pennington
+Ryan Fairfax
 Samuel Holland
+Segev Finer
 Shiz
 sin
 Solar Designer
 Stefan Kristiansson
+Stefan O'Rear
 Szabolcs Nagy
 Timo Teräs
 Trutz Behn
 Valentin Ochs
+Will Dietz
 William Haddon
 William Pitcock