Thanks to various people for bug reports and other comments on various
versions of tcpclient, tcpserver, and tcpcontrol:

A2P = Andrea Paolini
AI = Akihiro Iijima
AJDV = Albert J. deVera
AK = Ayamura Kikuchi
AP = Andrew Pam
ARB = Anand R. Buddhdev
AS = Amos Shapira
AT = Akihiro Terasaki
AV = Alex Vostrikov
AW = Arne Wichmann
AY = Araki Yasuhiro
BBBH = Bart B. B. Hanssens
BG = Bert Gijsbers
BJR = Brian J. Reichert
BK = Brendan Kehoe
BMF = Brian M. Fisk
BMS = Bradford M. Shelton
BOR = Brian O'Reilly
BW = Bruno Wolff
CG = Chris Garrigues
CJ = Chris Johnson
CW = Christian Wettergren
D2K = Dax Kelson
DCM = Daniel C. Mahoney
DEB = Donald E. Blais
DH = Darren Hall
DJ = Dirk Jaeckel
DJW = David J. Walton
DMV = Dan M. Vogel
DNW = Dale N. Woolridge
DP = David Pool
DPS = David P. Smith
DS = Dave Sill
DV = Dirk Vluegels
DWR = Darren W. Rees
E2W = Ed Weinberg
EAP = Eric A. Perlman
ESM = Edward S. Marshall
EW = Erik Wallin
FN = Faried Nawaz
FPL = Frederik P. Lindberg
GB = Gerry Boudreaux
GDP = Greg D. Patterson
GH = Grant Holliday
GL = Giles Lean
HB = Harald Barth
HF = Harald Fritzsche
HP = Hitesh Patel
HU = Hirofumi Ukawa
HY = Hiroshi Yamashita
IH = Ingmar Hupp
J1H = Johan Holmberg
J2B = Jos Backus
J2H = Jeff Hayward
J2W = Jeremy Wohl
JB = John Bolhuis
JBKH = J. B. Keith Humphreys
JDM = John D. Mitchell
JF = Janos Farkas
JJE = Joshua J. Ellis
JKB = Jakub K. Boguslaw
JL = Jim Littlefield
JLB = Julie L. Baumler
JM = Jose Monteiro
JRM = Jason R. Mastaler
K2K = Kris Kennaway
KB = Keith Burdis
KE = Kenny Elliott
KK = Kikuchi Kousuke
KL = Karl Lehenbauer
LBR = Lars Balker Rasmussen
LFB = Lyndon F. Bartels
LST = Louis S. Theran
M1S = Michael Salmon
MAZ = Matthew A. Zahorik
MBS = Michael B. Scher
MD = Mark Delany
MEE = Mads E. Eilertsen
MH = Michael Hirohama
MM = Martin Mersberger
MPS = Matt P. Simerson
MRG = Michael R. Gile
MS = Mikael Suokas
NM = Nobuhiro Murata
PMK = Patrick M. Kane
PN = Petr Novotny
PR = Peter Rye
PRR = Paul R. Rotering
PW = Peter Wilkinson
RA = Russ Allbery
RAL = Roberto A. Lumbreras
RAS = Richard A. Soderberg
RDM = Raul D. Miller
RN = Russell Nelson
RWL = Robert W. Luce
SAC = Shawn A. Clifford
SGT = Stathy G. Touloumis
SJ = Sudish Joseph
SML = Stefan M. Linnemann
SN = Stan Norton
SO = Shin Ohira
SOH = Shinya O'Hira
SR = Sean Reifschneider
T2K = Thomas Kuerten
TEE = Thomas E. Erskine
TG = Tim Goodwin
TLM = Timothy L. Mayo
TM = Toshinori Maeno
TT = Tomoaki Terazawa
TU = Todd Underwood
TY = Tomoki Yoshioka
UO = Uwe Ohse
VH = Vern Hart
VV = Vince Vielhaber
WA = Waskita Adijarto
WCH = Wu Ching-hong
WEB = William E. Baxter
WR = Wolfgang Rufeger
YT = Yoshitatsu Takeshita