bring back useful comment

Author: trask

instrumentation/akka/akka-http-10.0/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/akkahttp/server/AkkaHttpServerInstrumentationModule.java

@@ -29,6 +29,8 @@ public String getModuleGroup() {
 
   @Override
   public ElementMatcher.Junction<ClassLoader> classLoaderMatcher() {
+    // in GraphInterpreterInstrumentation we instrument a class that belongs to akka-streams, make
+    // sure this runs only when akka-http is present to avoid muzzle failures
     // added in 10.0.0
     return hasClassesNamed("akka.http.scaladsl.HttpExt");
   }

instrumentation/pekko/pekko-http-1.0/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/pekkohttp/v1_0/server/PekkoHttpServerInstrumentationModule.java

@@ -24,6 +24,8 @@ public PekkoHttpServerInstrumentationModule() {
 
   @Override
   public ElementMatcher.Junction<ClassLoader> classLoaderMatcher() {
+    // in GraphInterpreterInstrumentation we instrument a class that belongs to pekko-streams, make
+    // sure this runs only when pekko-http is present to avoid muzzle failures
     // added in 1.0.0
     return hasClassesNamed("org.apache.pekko.http.scaladsl.HttpExt");
   }