SQL: Fix docs build and cleanup docs index for merge

relates elastic/x-pack-elasticsearch#3084

Original commit: elastic/x-pack-elasticsearch@a64de41fbc

docs/en/index.asciidoc

@@ -25,6 +25,8 @@ include::{es-repo-dir}/reference/index-shared3.asciidoc[]
 
 :edit_url!:
 include::sql/index.asciidoc[]
+
+:edit_url!:
 include::monitoring/index.asciidoc[]
 
 :edit_url!:

docs/en/sql/endpoints/sql-cli.asciidoc

@@ -21,7 +21,7 @@ $ java -jar cli-{version}.jar https://some.server:9200
 The cli jar is entirely stand alone and can be moved whereever it is
 needed.
 
-Once the CLI is running you can use any <<sql-query-dsl,query>> that
+Once the CLI is running you can use any <<sql-spec,query>> that
 Elasticsearch supports:
 
 [source,sqlcli]

docs/en/sql/endpoints/sql-endpoints.asciidoc

@@ -1,5 +1,4 @@
 include::sql-rest.asciidoc[]
-include::sql-jdbc.asciidoc[]
 include::sql-translate.asciidoc[]
 include::sql-cli.asciidoc[]
 include::sql-jdbc.asciidoc[]

docs/en/sql/index.asciidoc

@@ -2,7 +2,7 @@
 [[xpack-sql]]
 = SQL Access
 
-:sql-tests: {docdir}/../../../qa/sql
+:sql-tests: {docdir}/../../qa/sql
 :sql-specs: {sql-tests}/src/main/resources
 :jdbc-tests: {sql-tests}/src/main/java/org/elasticsearch/xpack/qa/sql/jdbc
 :security-tests: {sql-tests}/security/src/test/java/org/elasticsearch/xpack/qa/sql/security
@@ -32,4 +32,3 @@ include::functions/sql-functions.asciidoc[]
 include::language/sql-language.asciidoc[]
 
 :jdbc-tests!:
-