sql: order users in SHOW USERS
sql: order users in SHOW USERS

Without DistSQL, these are automatically ordered. With distsql, not necessarily.

paperstreet/cockroach,paperstreet/cockroach,paperstreet/cockroach,paperstreet/cockroach,paperstreet/cockroach,paperstreet/cockroach,paperstreet/cockroach,paperstreet/cockroach