Increase sshd threads for gerrit.

Based on the advice in this thread:
http://groups.google.com/group/repo-discuss/browse_thread/thread/b91491c185295a71

Size the sshd threads (which are also used to handle https git requests)
better.  Based on current trends, we peak at about 50% cpu usage
and 25% memory usage.  Double the number of threads here to try to
allow us to get closer to 100% cpu.

(Corresponding increase in db connections.)

Change-Id: Icde18233de01466b241ab28d38d2e98735108193

modules/gerrit/templates/gerrit.config.erb

@@ -9,7 +9,7 @@
 	hostname = localhost
 	database = reviewdb
 	username = gerrit2
-	poolLimit = 20
+	poolLimit = 32
 [auth]
 	type = OPENID_SSO
 	openIdSsoUrl = <%= openidssourl %>
@@ -22,7 +22,7 @@
 	javaHome = /usr/lib/jvm/java-6-openjdk/jre
 [sshd]
 	listenAddress = *:29418
-	threads = 12
+	threads = 24
 [httpd]
 	listenUrl = proxy-https://*:8081/
 	acceptorThreads = 8
@@ -36,4 +36,4 @@
 [commentlink "<%= commentlink['name'] %>"]
         match = "<%= commentlink['match'] %>"
         link = "<%= commentlink['link'] %>"
-<% end -%>
+<% end -%>