class vs struct mismatch fixes

httpserver/httpdocrootsettings.h

@@ -12,8 +12,9 @@
 
 namespace qtwebapp {
 
-struct HttpDocrootSettings
+class HttpDocrootSettings
 {
+public:
     QString path;
     QString encoding;
     int maxAge;

httpserver/httplistenersettings.h

@@ -10,8 +10,9 @@
 
 namespace qtwebapp {
 
-struct HttpListenerSettings
+class HttpListenerSettings
 {
+public:
     QString host;
     int port;
     int minThreads;

plugins/channelrx/demodatv/atvdemodsettings.h

@@ -21,7 +21,7 @@
 #include <QString>
 #include <stdint.h>
 
-struct Serializable;
+class Serializable;
 
 struct ATVDemodSettings
 {

sdrbase/dsp/cwkeyersettings.h

@@ -21,8 +21,9 @@
 #include <QString>
 #include <QByteArray>
 
-struct CWKeyerSettings
+class CWKeyerSettings
 {
+public:
     typedef enum
     {
         CWNone,