Add more high level config parameter types

common/rfb/Blacklist.cxx

@@ -33,12 +33,12 @@ IntParameter threshold("BlacklistThreshold",
                        "The number of unauthenticated connection attempts "
                        "allowed from any individual host before that host "
                        "is black-listed",
-                       5);
+                       5, 0, INT_MAX);
 IntParameter initialTimeout("BlacklistTimeout",
                             "The initial timeout applied when a host is "
                             "first black-listed. The host cannot re-attempt "
                             "a connection until the timeout expires.",
-                            10);
+                            10, 0, INT_MAX);
 
 
 Blacklist::Blacklist() {

common/rfb/CMsgReader.cxx

@@ -39,7 +39,10 @@
 
 static rfb::LogWriter vlog("CMsgReader");
 
-static rfb::IntParameter maxCutText("MaxCutText", "Maximum permitted length of an incoming clipboard update", 256*1024);
+static rfb::IntParameter maxCutText("MaxCutText",
+                                    "Maximum permitted length of an "
+                                    "incoming clipboard update",
+                                    256*1024, 0, INT_MAX);
 
 using namespace rfb;