Enable sshd.batchThreads by default

Change default value of sshd.batchThreads from 0 to 1 or 2 depending on
the core counts. When Gerrit runs on single code node 1 will be used as
default, 2 otherwise.

Change-Id: I4c04157e9edead9cdf0105aebc5d1658fa60f494
Signed-off-by: Dariusz Luksza <dariusz@luksza.org>
diff --git a/Documentation/config-gerrit.txt b/Documentation/config-gerrit.txt
index e7b7cdc..60bc8b6 100644
--- a/Documentation/config-gerrit.txt
+++ b/Documentation/config-gerrit.txt
@@ -3427,7 +3427,7 @@
 than the total number of threads allocated in sshd.threads, then the
 value of sshd.threads is increased to accommodate the requested value.
 +
-By default, 0.
+By default is 1 on single core node, 2 otherwise.
 
 [[sshd.streamThreads]]sshd.streamThreads::
 +