Fix lots of broken links in the docs, found by Sphinx' external link checker.
diff --git a/Doc/library/imaplib.rst b/Doc/library/imaplib.rst
index 4279fa5..e18d7d5 100644
--- a/Doc/library/imaplib.rst
+++ b/Doc/library/imaplib.rst
@@ -117,7 +117,7 @@
Documents describing the protocol, and sources and binaries for servers
implementing it, can all be found at the University of Washington's *IMAP
- Information Center* (http://www.cac.washington.edu/imap/).
+ Information Center* (http://www.washington.edu/imap/).
.. _imap4-objects: