Add anchor for account query options

This allows to link to the place in the documentation where the account
query options are described.

Signed-off-by: Edwin Kempin <ekempin@google.com>
Change-Id: Id6c4c1faab54a49951671dc2f6e27d4e360fee7f
diff --git a/Documentation/rest-api-accounts.txt b/Documentation/rest-api-accounts.txt
index b073872..6fbedb0 100644
--- a/Documentation/rest-api-accounts.txt
+++ b/Documentation/rest-api-accounts.txt
@@ -52,6 +52,7 @@
 The `S` or `start` query parameter can be supplied to skip a number
 of accounts from the list.
 
+[[query-options]]
 Additional fields can be obtained by adding `o` parameters, each
 option slows down the query response time to the client so they are
 generally disabled by default. Optional fields are: