Comment 3 for bug 1242108

This happened in revision 39:
http://bazaar.launchpad.net/~ubuntu-branches/ubuntu/trusty/zsh/trusty/revision/39

{{{
   - Keep using the upstream tarball that contains pre-generated docs as
    yodl is required to build them but the MIR hasn't been approved.
  - Drop yodl from Build-Depends.
  - Support cross-compiling:
    - Adjust upstream autoconf cross-compile default fallbacks.
    - Skip zcompile when cross-compiling.
    - Add libelf-dev dependency.
  + Add doc tarball component
  + Drop patches that modify docs, add patch to skip building docs.
}}}

We still need the man pages.