Switch submodule kooldock to https

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>

.gitmodules

@@ -354,7 +354,7 @@
 	url = https://system@scm.trinitydesktop.org/scm/git/konversation
 [submodule "main/applications/kooldock"]
 	path = main/applications/kooldock
-	url = http://system@scm.trinitydesktop.org/scm/git/kooldock
+	url = https://system@scm.trinitydesktop.org/scm/git/kooldock
 [submodule "main/applications/kopete-otr"]
 	path = main/applications/kopete-otr
 	url = https://system@scm.trinitydesktop.org/scm/git/kopete-otr