notes/tiddlywiki/MongoDB - reconfigure replicaset examples.md

Change hostname

cfg = rs.conf()
cfg.members[0].host = "ivera-mongo01.swgalaxy:27017"
cfg.members[1].host = "ivera-mongo02.swgalaxy:27017"
rs.reconfig(cfg)

Change priority

cfg = rs.conf()
cfg.members[0].priority = 1
cfg.members[1].priority = 1
rs.reconfig(cfg)

Add new member

rs.add('ivera-mongo03.swgalaxy:27017');