URI regexp: allow empty queries and fragments

Test:
http://example.com/?

src/autotests/HotSpotFilterTest.cpp

@@ -60,9 +60,9 @@ void HotSpotFilterTest::testUrlFilterRegex_data()
                                         << "https://example.com/foo,bar" << true;
 
     QTest::newRow("empty_query") << "http://example.com/?"
-                                 << "http://example.com/" << true;
+                                 << "http://example.com/?" << true;
     QTest::newRow("empty_fragment") << "http://example.com/#"
-                                    << "http://example.com/" << true;
+                                    << "http://example.com/#" << true;
 
     QTest::newRow("www_followed_by_colon") << "www.example.com:foo@bar.com"
                                            << "www.example.com" << true;

src/filterHotSpots/UrlFilter.cpp

@@ -52,8 +52,8 @@ static const char port[] = "(?::[0-9]+)?+"; // :1234
 
 #define COMMON_2 "a-z0-9\\-._~%!$&'()*+,;=:@/"
 static const char path[] = "(?:/[" COMMON_2 "]*+)?+"; // /path/to/some/place
-static const char query[] = "(?:\\?[" COMMON_2 "?]+)?+"; // "?somequery=bar"
+static const char query[] = "(?:\\?[" COMMON_2 "?]*+)?+"; // "?somequery=bar"
-static const char fragment[] = "(?:#[" COMMON_2 "?]+)?+"; // "#fragment"
+static const char fragment[] = "(?:#[" COMMON_2 "?]*+)?+"; // "#fragment"
 
 using LS1 = QLatin1String;