+Add support to "notmuch search" and "notmuch show" to allow for
+listing of duplicate messages, (distinct filenames with the same
+Message-ID). I'm not sure what the option should be named. Perhaps
+--with-duplicates ?
+
+Add a -0 option to "notmuch search" so that one can safely deal with
+any filename with:
+
+ notmuch search --output=files -0 <terms> | xargs -0 <command>
+
+"notmuch setup" should use realpath() before replacing the
+configuration file. The ensures that the final target file of any
+intermediate symbolic links is what is actually replaced, (rather than
+any symbolic link).
+