planck: add missing dependency on pa_monad_custom

found as part of ocamlot triage run in OCamlPro/opam-repository#1029
Fix Eliom build to not log to /tmp/log unconditionally

This fixes the OCamlot test run tracked in OCamlPro/opam-repository#1029
Thanks to @hhugo for the patch as part of ocsigen/eliom#2
xenctrl: depend on cmdliner, and improve BSD-compat by using `make` instead of `"make"` (so that gmake is used on BSD instead of make)

bug found as part of OCamlot triage run tracked in OCamlPro/opam-repository#1029
add ocaml-4.1 compatible version of pomap

Found as part of triage of OCamlPro/opam-repository#1029
Merge pull request #1046 from mirage/ocamlot-triage-20130902

Ocamlot triage 20130902