Clarify treatment of double slashes in rtl::Uri::convertRelToAbs

Change-Id: I71d0ded04b35472f14e4764a47212c73ac500814

sal/qa/rtl/uri/rtl_testuri.cxx

@@ -330,7 +330,11 @@ void Test::test_Uri() {
             { "http://a/b/..", "../c", "http://a/c" },
             { "http://a/./b/", ".././.././../c", "http://a/c" },
             { "http://a", "b", "http://a/b" },
-            { "", "http://a/b/../c", "http://a/c" } };
+            { "", "http://a/b/../c", "http://a/c" },
+
+            { "http://a/b/c", "d", "http://a/b/d" },
+            { "http://a/b/c/", "d", "http://a/b/c/d" },
+            { "http://a/b/c//", "d", "http://a/b/c//d" } };
     for (std::size_t i = 0; i < sizeof aRelToAbsTest / sizeof (RelToAbsTest); ++i)
     {
         rtl::OUString aAbs;