Actually tell the server we understand server-time...

irc/src/main/java/com/dmdirc/parser/irc/processors/ProcessCap.java

         supportedCapabilities.add("account-notify");
         supportedCapabilities.add("extended-join");
         supportedCapabilities.add("self-message");
+        supportedCapabilities.add("server-time");
 
         // Freenode
         // supportedCapabilities.add("identify-msg");