Allow clearing favicon in ServerPing builder.

api/src/main/java/com/velocitypowered/api/proxy/server/ServerPing.java

@@ -262,6 +262,11 @@ public final class ServerPing {
       return this;
     }
 
+    public Builder clearFavicon() {
+      this.favicon = null;
+      return this;
+    }
+
     /**
      * Uses the information from this builder to create a new {@link ServerPing} instance. The
      * builder can be re-used after this event has been called.

api/src/test/java/com/velocitypowered/api/proxy/messages/MinecraftChannelIdentifierTest.java

@@ -35,6 +35,11 @@ class MinecraftChannelIdentifierTest {
     assertEquals(expected, MinecraftChannelIdentifier.from("velocity:test"));
   }
 
+  @Test
+  void createAllowsSlashes() {
+    create("velocity", "test/test2");
+  }
+
   @Test
   void fromIdentifierThrowsOnBadValues() {
     assertAll(