(docs) Fix link parsing errors

Author: austb

documentation/configure_postgres.markdown

@@ -1,3 +1,8 @@
+[pg_trgm]: http://www.postgresql.org/docs/current/static/pgtrgm.html
+[postgres_ssl]: ./postgres_ssl.markdown
+[migration_coordination]: ./migration_coordination.markdown
+[module]: ./install_via_module.markdown
+
 # Using PostgreSQL
 
 Before using the PostgreSQL backend, you must set up a PostgreSQL server. Note

documentation/release_notes_6.markdown

@@ -10,6 +10,7 @@ canonical: "/puppetdb/latest/release_notes.html"
 [fact-contents]: ./api/query/v4/fact-contents.markdown
 [metrics]: ./api/metrics/v1/changes-from-puppetdb-v3.markdown
 [puppet-apply]: ./connect_puppet_apply.markdown
+[api-overview]: ./api/query/v4/overview.markdown
 
 ---
 
@@ -43,7 +44,7 @@ canonical: "/puppetdb/latest/release_notes.html"
   ```
   inventory[] { trusted.extensions.foo = "bar"}
   ```
-  instead of `facts.trusted.extensions.foo`, the index wasn't hit. The change introduced by this ticket ensures that an index is hit if the query is made with just trusted.[fact]. ([PDB-4985](https://tickets.puppetlabs.com/browse/PDB-4985))
+  instead of `facts.trusted.extensions.foo`, the index wasn't hit. The change introduced by this ticket ensures that an index is hit if the query is made with just `trusted.[fact]`. ([PDB-4985](https://tickets.puppetlabs.com/browse/PDB-4985))
 
 ### Contributors