REGTESTS: startup: change the expected maxconn to 11000

change the expected maxconn from 10000 to 11000 in
automatic_maxconn.vtc

To be backported only if the test failed, the value might be the right
one in previous versions.
diff --git a/reg-tests/startup/automatic_maxconn.vtc b/reg-tests/startup/automatic_maxconn.vtc
index 686a5c5..3b5aeb4 100644
--- a/reg-tests/startup/automatic_maxconn.vtc
+++ b/reg-tests/startup/automatic_maxconn.vtc
@@ -29,7 +29,7 @@
 
 haproxy h2 -cli {
 	send "show info"
-	expect ~ ".*Maxconn: 10000\n.*"
+	expect ~ ".*Maxconn: 11000\n.*"
 }
 
 haproxy h3 -arg "-m 256" -conf {