Revert "Bump cling-* from 2.0.1 to 2.1.2"

Following comment in #1505, this reverts the following commits:

* 0a231a6575
* 73747db980
* 77a95b0e86

airsonic-main/pom.xml

@@ -344,19 +344,19 @@
         <dependency>
             <groupId>org.fourthline.cling</groupId>
             <artifactId>cling-core</artifactId>
-            <version>2.1.2</version>
+            <version>2.0.1</version>
         </dependency>
 
         <dependency>
             <groupId>org.fourthline.cling</groupId>
             <artifactId>cling-support</artifactId>
-            <version>2.1.2</version>
+            <version>2.0.1</version>
         </dependency>
 
         <dependency>
             <groupId>org.seamless</groupId>
             <artifactId>seamless-util</artifactId>
-            <version>1.1.2</version>
+            <version>1.1.0</version>
         </dependency>
 
         <dependency>