+1.5.19 (2009-01-05):
+
+ + support for SSL certificate chains
+ + <what-key> function works in pager, too
+ + support for tokyocabinet (qdbm successor)
+ ! $move now defaults to "no" instead of "ask-no"
+ + $imap_pipeline_depth controls the number of commands that mutt can issue
+ to an IMAP server before it must collect the responses
+ + $ssl_client_cert available with gnutls as well as openssl
+ + 'mime_lookup application/octet-stream' added to system Muttrc
+
+1.5.18 (2008-05-17):
+
+ ! header caches internally are utf-8 regardless of current locale