- Removed explicit mozilla_build_version; instead use pkg-config to
        determine the path to the NSS/NSPR headers.
    - Use a macro to express requirement on pilot-link (was 1:0.11.4, now 0.12;
        patches depend on this)
    - Re-enabled the new-mail-notify plugin (my patch to handle differing DBus
        versions is in the upstream tarball; but configure.in disables the
        plugin for dbus versions > 0.23; patched configure.in to allow
        arbitrary DBus versions, and run autoconf at the start of the build)
        (#156328)