added copyright notices and fixed broken links

Author: radu-gheorghe

album-recommendation-java/README.md

@@ -49,8 +49,8 @@ to see the custom metric in
 <a href="http://localhost:19092/metrics/v1/values?consumer=my-metrics" data-proofer-ignore>
 http://localhost:19092/metrics/v1/values?consumer=my-metrics</a>
 
-This code uses a [Counter](https://github.com/vespa-engine/vespa/blob/master/container-core/src/main/java/com/yahoo/metrics/simple/Counter.java) -
-A [Gauge](https://github.com/vespa-engine/vespa/blob/master/container-core/src/main/java/com/yahoo/metrics/simple/Gauge.java)
+This code uses a [Counter](https://github.com/vespa-engine/vespa/blob/master/container-disc/src/main/java/com/yahoo/metrics/simple/Counter.java) -
+A [Gauge](https://github.com/vespa-engine/vespa/blob/master/container-disc/src/main/java/com/yahoo/metrics/simple/Gauge.java)
 example, with a dimension could be like:
 
 ````

examples/lucene-linguistics/custom-analyzer-non-java/app/services.xml

@@ -1,4 +1,5 @@
 <?xml version="1.0" encoding="utf-8" ?>
+<!-- Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root. -->
 <services version="1.0" minimum-required-vespa-version="8.315.19">
   <container id="container" version="1.0">
     <component id="linguistics"

examples/lucene-linguistics/multiple-profiles/app/schemas/doc.sd

@@ -8,7 +8,7 @@ schema doc {
 
         field title type string {
             indexing: summary | index
-            # use this when the profile (analyzer configuration) is the same for indexing and searching
+            # use this when the profile is the same for indexing and searching
             linguistics {
                 profile: lowerFolding
             }

examples/lucene-linguistics/multiple-profiles/app/services.xml

@@ -1,4 +1,5 @@
 <?xml version="1.0" encoding="utf-8" ?>
+<!-- Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root. -->
 <services version="1.0" minimum-required-vespa-version="8.315.19">
   <container id="container" version="1.0">
     <component id="linguistics"