Switch IRC references from freenode to OFTC

See http://lists.openstack.org/pipermail/openstack-discuss/2021-May/022718.html
and http://lists.opendev.org/pipermail/service-discuss/2021-May/000249.html
for more information.

Change-Id: I6ac37c23153c5c9d42d96e448e0656dbf8257991

AUTHORS

@@ -1,7 +1,7 @@
 Maintainer
 ----------
 OpenStack Foundation
-IRC: #openstack on irc.freenode.net
+IRC: #openstack on irc.oftc.net
 
 Original Authors
 ----------------

CONTRIBUTING.rst

@@ -18,7 +18,7 @@ review and all tests before it can be included in the project. Reviewing
 proposed patches is a very helpful way to be a contributor.
 
 Swift is nothing without the community behind it. We'd love to welcome you to
-our community. Come find us in #openstack-swift on freenode IRC or on the
+our community. Come find us in #openstack-swift on OFTC IRC or on the
 OpenStack dev mailing list.
 
 For general information on contributing to OpenStack, please check out the
@@ -79,8 +79,7 @@ what to work on, check out the "wishlist" bugs in the bug tracker. These are
 normally smaller items that someone took the time to write down but didn't
 have time to implement.
 
-And please join #openstack-swift on freenode IRC to tell us what you're
-working on.
+And please join #openstack-swift on OFTC IRC to tell us what you're working on.
 
 Getting Started
 ---------------

README.rst

@@ -153,7 +153,7 @@ page.
 
 --------------
 
-For more information come hang out in #openstack-swift on freenode.
+For more information come hang out in #openstack-swift on OFTC.
 
 Thanks,
 

doc/source/contributor/contributing.rst

@@ -7,7 +7,7 @@ Communication
 -------------
 IRC
     People working on the Swift project may be found in the
-    ``#openstack-swift`` channel on Freenode during working hours
+    ``#openstack-swift`` channel on OFTC during working hours
     in their timezone.  The channel is logged, so if you ask a question
     when no one is around, you can check the log to see if it's been
     answered: http://eavesdrop.openstack.org/irclogs/%23openstack-swift/

docker/dockerhub_description.md

@@ -47,4 +47,4 @@ s3cmd -c s3cfg_saio mb s3://bucket
    a specific release.
 - **Source Code**: github.com/openstack/swift
 - **Maintained by**: Openstack Swift community
-- **Feedback/Questions**: #openstack-swift on freenode
+- **Feedback/Questions**: #openstack-swift on OFTC