Update submodules: plugins (new commits)

plugins:
    3ed98dd Chris Smith <chris@dmdirc.com>
            Tidy various plugins.

            In particular make the DNS plugin use the DNS dagger module, not
            the debug module. Testing++.

            Gerrit: http://gerrit.dmdirc.com/3846

Change-Id: I87d07b068732adde48576e0f3f0956f2ea0aaec7

modules/plugins

@@ -1 +1 @@
-Subproject commit 8c88b5c68af1228fd4601c80e74673f3674709c2
+Subproject commit 3ed98ddd694b3f004bdb5694aacca480f16fc879