[Buildbot] #2905: minimise number of IRC bots

[Buildbot trac]

#2905: minimise number of IRC bots
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Reporter:  sa2ajj  |       Owner:
    Type:  task    |      Status:  new
Priority:  major   |   Milestone:  sys - on-bb-infra
 Version:          |  Resolution:
Keywords:          |
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Comment (by sa2ajj):

 A few features that are not mentioned above:

 * IRC channel logging
 * ability to use `s/something/fixed anything/`

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Ticket URL: <http://trac.buildbot.net/ticket/2905#comment:3>
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