Fix check_radius returning OK on unexpected results

REJECT_RC is defined on some radiusclient versions and differenciates
between auth errors and bad responses. This patch will affect only the
behaviour of those clients exporting REJECT_RC.

In addition, unexpected return codes are now handled properly and
return UNKNOWN.

1 files changed, 1 insertions, 0 deletions

diff --git a/THANKS.in b/THANKS.in
index f62a4d8..0b1dab6 100644
--- a/THANKS.in
+++ b/THANKS.in
@@ -263,3 +263,4 @@ Konstantin Khomoutov
 Josip Rodin
 Dann Frazier
 Stephane Chazelas
+Craig Leres