drop UNIQUE indices for (addr, port) when converting the database.

pyweb/mumble/conversionsql/mysql/01-schema-prepare-mumble.sql

@@ -6,6 +6,10 @@ ALTER TABLE `mumble_mumble`
         ADD `display` varchar(200) AFTER `name`;
 COMMIT;
 
+BEGIN;
+ALTER TABLE mumble_mumble DROP KEY `addr`;
+COMMIT;
+
 BEGIN;
 CREATE INDEX `mumble_mumble_server_id_idx`
         ON `mumble_mumble` (`server_id`);

pyweb/mumble/conversionsql/pgsql/01-schema-prepare-mumble.sql

@@ -5,3 +5,5 @@ ALTER TABLE "mumble_mumble"
         ADD "display" varchar(200);
 
 CREATE INDEX "mumble_mumble_server_id" ON "mumble_mumble" ("server_id");
+
+ALTER TABLE "mumble_mumble" DROP CONSTRAINT "mumble_mumble_addr_key";

pyweb/mumble/conversionsql/sqlite/01-schema-mumble.sql

@@ -6,6 +6,5 @@ CREATE TABLE "mumble_mumble_new" (
     "addr" varchar(200) NOT NULL,
     "port" integer NOT NULL,
     "display" varchar(200) NOT NULL,
-    UNIQUE ("server_id", "srvid"),
-    UNIQUE ("addr", "port")
+    UNIQUE ("server_id", "srvid")
 );