Improve parsing of ping6(1) output

The ping6(1) implementation provided by Debian's iputils-ping package
may produce output such as the following:

| 3 packets transmitted, 0 received, +3 errors, 100% packet loss, time 2009ms

There's a corresponding pattern in check_ping.c:458:

| "%*d packets transmitted, %*d received, +%*d errors, %d%% packet loss"

Without this fix, the pattern in check_ping.c:456 matched first (as
sscanf(3) interprets "+3" as a match for "%d"):

| "%*d packets transmitted, %*d received, %d%% loss, time"

(#1894850 - Debian bug report #514588 - Matej Vela)

1 files changed, 1 insertions, 0 deletions

diff --git a/THANKS.in b/THANKS.in
index c858ce4..32a8868 100644
--- a/THANKS.in
+++ b/THANKS.in
@@ -272,3 +272,4 @@ Sebastian Harl
 Jason Lunn
 Alex Griffin
 Marc Remy
+Matej Vela