Update the docs about IRC

[aaron.ballman]

Summary

We haven't had a Geordi bot in years and we moved the build bot to another channel. This updates the documentation to be more reflective of reality, and it also identifies whether a channel is actively moderated or not.

[jdoerfert]

LG

llvm/docs/GettingInvolved.rst

 
 
 .. _IRC:
 
 IRC
 ---
 
 Users and developers of the LLVM project (including subprojects such as Clang)
-can be found in #llvm on `irc.oftc.net <irc://irc.oftc.net/llvm>`_.
+can be found in #llvm on `irc.oftc.net <irc://irc.oftc.net/llvm>`_. The channel
+is actively moderated.
 
-This channel has several bots.
-
-* Buildbot reporters
-
-  * llvmbb - Bot for the main LLVM buildbot master.
-    http://lab.llvm.org/buildbot/#/console
-
-* robot - Bugzilla linker. %bug <number>
-
-* clang-bot - A `geordi <http://www.eelis.net/geordi/>`_ instance running
-  near-trunk clang instead of gcc.
+The #llvm-build channel has a bot for
+`LLVM buildbot <http://lab.llvm.org/buildbot/#/console>`_ status changes. The
+bot will post a message with a link to a build bot and a blamelist when a build
+goes from passing to failing and again (without the blamelist) when the build
+goes from failing back to passing. It is a good channel for actively monitoring
+build statuses, but it is a noisy channel due to the automated messages. The
+channel is not actively moderated.
 
 In addition to the traditional IRC there is a
 `Discord <https://discord.com/channels/636084430946959380/636725486533345280>`_
 chat server available. To sign up, please use this
 `invitation link <https://discord.com/invite/xS7Z362>`_.
 
 
 .. _meetups-social-events: