Use override syntax for http classes

Author: linev

net/http/inc/THttpCallArg.h

@@ -250,7 +250,7 @@ class THttpCallArg : public TObject {
       AssignWSId();
    }
 
-   ClassDef(THttpCallArg, 0) // Arguments for single HTTP call
+   ClassDefOverride(THttpCallArg, 0) // Arguments for single HTTP call
 };
 
 #endif

net/http/inc/THttpEngine.h

@@ -39,7 +39,7 @@ class THttpEngine : public TNamed {
    /** Returns pointer to THttpServer associated with engine */
    THttpServer *GetServer() const { return fServer; }
 
-   ClassDef(THttpEngine, 0) // abstract class which should provide http-based protocol for server
+   ClassDefOverride(THttpEngine, 0) // abstract class which should provide http-based protocol for server
 };
 
 #endif

net/http/inc/THttpWSHandler.h

@@ -108,7 +108,7 @@ friend class THttpServer;
 
    virtual Bool_t ProcessWS(THttpCallArg *arg) = 0;
 
-   ClassDef(THttpWSHandler, 0) // abstract class for handling websocket requests
+   ClassDefOverride(THttpWSHandler, 0) // abstract class for handling websocket requests
 };
 
 #endif

net/http/inc/TRootSnifferStore.h

@@ -45,7 +45,7 @@ class TRootSnifferStore : public TObject {
    Int_t GetResRestrict() const { return fResRestrict; }
    virtual Bool_t IsXml() const { return kFALSE; }
 
-   ClassDef(TRootSnifferStore, 0) // structure for results store of objects sniffer
+   ClassDefOverride(TRootSnifferStore, 0) // structure for results store of objects sniffer
 };
 
 // ========================================================================