URI regexp: allow / as path

Allow a single slash as path component of a URI.

Test:
https://example.com/?query=value

src/autotests/HotSpotFilterTest.cpp

@@ -60,17 +60,17 @@ 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;
 
     QTest::newRow("ipv6") << "http://[2a00:1450:4001:829::200e]/"
-                          << "http://[2a00:1450:4001:829::200e]" << true;
+                          << "http://[2a00:1450:4001:829::200e]/" << true;
     QTest::newRow("ipv6_with_port") << "http://[2a00:1450:4001:829::200e]:80/"
-                                    << "http://[2a00:1450:4001:829::200e]:80" << true;
+                                    << "http://[2a00:1450:4001:829::200e]:80/" << true;
 }
 
 void HotSpotFilterTest::testUrlFilterRegex()

src/filterHotSpots/UrlFilter.cpp

@@ -51,7 +51,7 @@ static const char host[] = "(?:[" COMMON_1 "]++|" IPv6_literal ")?+"; // www.foo
 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 path[] = "(?:/[" COMMON_2 "]*+)?+"; // /path/to/some/place
 static const char query[] = "(?:\\?[" COMMON_2 "]+)?+"; // "?somequery=bar"
 static const char fragment[] = "(?:#[" COMMON_2 "]+)?+"; // "#fragment"