Add test for urlencoding passwords

src/test/java/com/dmdirc/util/URIParserURIParameterizedTest.java

             {"irc://irc.test.com:+6667", "ircs://irc.test.com:6667"},
             {"ircs://irc.test.com:+6667", "ircs://irc.test.com:6667"},
             {"ircs://irc.test.com:+6667", "ircs://irc.test.com:6667"},
-            {"ircs://username@irc.test.com:+6667", "ircs://username@irc.test.com:6667"},});
+            {"ircs://username@irc.test.com:+6667", "ircs://username@irc.test.com:6667"},
+            {"ircs://username:password%2Fnetwork@irc.test.com:+6667", "ircs://username:password%2Fnetwork@irc.test.com:6667"},
+        });
     }
 
 }