check_ifstatus: perfdata bug

The perfdata output violates the current Nagios Plugin Development Guidelines
(http://nagiosplug.sourceforge.net/developer-guidelines.html#AEN202 :
"space separated list of label/value pairs").

Thus the Addon PNP did not read the perdata correctly.

The patch replaces the commas with spaces in the perfdata output.

Many thanks to Patric Wust.
---
Closes #1169 and #721.

1 files changed, 1 insertions, 0 deletions

diff --git a/THANKS.in b/THANKS.in
index 883387e5..43ba182f 100644
--- a/THANKS.in
+++ b/THANKS.in
@@ -323,3 +323,4 @@ Eric J. Mislivec
 Jean-Claude Computing
 Andy Brist
 Mikael Falkvidd
+Patric Wust