SSH query command: Add --start n option to skip n changes

Change-Id: If5031ce1a91a4fa68828241f1dfcf0c54f58652e

Documentation/cmd-query.txt

@@ -15,6 +15,7 @@ gerrit query - Query the change database
   [--dependencies]
   [--submit-records]
   [--all-reviewers]
+  [--start <n> | -S <n>]
   [--]
   <query>
   [limit:<n>]
@@ -95,6 +96,10 @@ command line parser in the server).
 	includes whether the change meets the criteria for submission
 	(including information for each review label).
 
+--start::
+-S::
+	Number of changes to skip.
+
 limit:<n>::
 	Maximum number of results to return.  This is actually a
 	query operator, and not a command line option.	If more

gerrit-server/src/main/java/com/google/gerrit/server/query/change/QueryProcessor.java

@@ -146,7 +146,7 @@ public class QueryProcessor {
     limit = n;
   }
 
-  void setStart(int n) {
+  public void setStart(int n) {
     start = n;
   }
 

gerrit-sshd/src/main/java/com/google/gerrit/sshd/commands/Query.java

@@ -85,6 +85,11 @@ class Query extends SshCommand {
     processor.setIncludeSubmitRecords(on);
   }
 
+  @Option(name = "--start", aliases = {"-S"}, usage = "Number of changes to skip")
+  void setStart(int start) {
+    processor.setStart(start);
+  }
+
   @Argument(index = 0, required = true, multiValued = true, metaVar = "QUERY", usage = "Query to execute")
   private List<String> query;