Revert "SERVER-7573 SERVER-4661 Add test for mongos detecting RS failover when primary loses network connectivity"

This reverts commit 8ed4f87153afe99609898c6af7e1b58327e6335f.
Make auth client example a better example of what clients should do
Make auth client example use new form of auth method
Use DBQuery._addSpecial() more and return self from comment()

Changing comment()'s return value is a BC break, but this makes the method consistent with other modifiers that also add special query properties.

Also adds a few methods to the DBQuery.help() output.

Signed-off-by: Ian Whalen <ian.whalen@gmail.com>
SERVER-8280 SERVER-7864 Make copydb command work without username/password when dest machine has auth but source does not
SERVER-9003 - Display replica set chaining topology in rs.status()

Include syncingTo in heartbeat response and display this info for each
replica set member in the replSetGetStatus command.
SERVER-6991 better stats for sharded connections and sharded conn pool