Drop the commons-lang and dnsjava dependencies

Both were pulled in for a single call each: commons-lang for
ConstructorUtils.invokeConstructor when building a packet handler, and
dnsjava for the _ts3._udp SRV lookup. Together they added over a
megabyte to a shaded jar (and dnsjava drops jnamed/update classes into
the jar root). Plain reflection and JNDI's dns: provider cover both.

Also drop the BouncyCastleProvider registration: every digest here is
requested by a name the SUN provider already answers, so the only thing
it accomplished was keeping the whole JCE provider, the post-quantum
suite and the X.509 stack reachable for a shaded-jar tree-shaker.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

pom.xml

@@ -40,18 +40,6 @@
             <version>1.67</version>
         </dependency>
 
-        <dependency>
-            <groupId>commons-lang</groupId>
-            <artifactId>commons-lang</artifactId>
-            <version>2.6</version>
-        </dependency>
-
-        <dependency>
-            <groupId>dnsjava</groupId>
-            <artifactId>dnsjava</artifactId>
-            <version>2.1.8</version>
-        </dependency>
-
         <dependency>
             <groupId>org.ini4j</groupId>
             <artifactId>ini4j</artifactId>