feature: improved readability for snmp debug output

It now matches RRD and SQL output format, the color is cyan
Slightly better ip removal from debug output, only removes valid IPs now.

includes/snmp.inc.php

@@ -554,10 +554,6 @@ function snmp_gen_auth(&$device)
         }
     }//end if
 
-    if ($vdebug) {
-        print "DEBUG: SNMP Auth options = $cmd\n";
-    }
-
     return $cmd;
 }//end snmp_gen_auth()