* ./configure.in: we now require autoconf 2.5x because previous versions

    don't seem to work very well if you are using autopoint, although
    gettext 0.11.5 claims to be fully backwards compatible. Welcome to
    automake hell.
  * ./bootstrap: workaround which uses gettextize if you do not have
    autopoint. We'll probably stay like this for a while, until gettext
    0.11.x (which replaces gettextize with autopoint) becomes more
    widespread. Currently this workaround seems to work, but don't expect
    a clean tarball if you make dist without having used autopoint. Welcome
    to automake hell.