cookbook: only load the custom file once
cookbook: only load the custom file once

EricssonResearch/cerbero,nzjrs/cerbero,shoreflyer/cerbero,cee1/cerbero-mac,AlertMe/cerbero,multipath-rtp/cerbero,justinjoy/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,GStreamer/cerbero,fluendo/cerbero,brion/cerbero,ikonst/cerbero,shoreflyer/cerbero,brion/cerbero,sdroege/cerbero,atsushieno/cerbero,ylatuya/cerbero,BigBrother-International/gst-cerbero,superdump/cerbero,ylatuya/cerbero,OptoFidelity/cerbero,shoreflyer/cerbero,ramaxlo/cerbero,centricular/cerbero,GStreamer/cerbero,jackjansen/cerbero,AlertMe/cerbero,ikonst/cerbero,nirbheek/cerbero-old,multipath-rtp/cerbero,ford-prefect/cerbero,OptoFidelity/cerbero,shoreflyer/cerbero,AlertMe/cerbero,nzjrs/cerbero,nirbheek/cerbero-old,sdroege/cerbero,atsushieno/cerbero,lubosz/cerbero,davibe/cerbero,sdroege/cerbero,superdump/cerbero,nirbheek/cerbero,EricssonResearch/cerbero,atsushieno/cerbero,superdump/cerbero,nzjrs/cerbero,lubosz/cerbero,davibe/cerbero,nirbheek/cerbero-old,cee1/cerbero-mac,AlertMe/cerbero,nirbheek/cerbero,centricular/cerbero,lubosz/cerbero,BigBrother-International/gst-cerbero,cee1/cerbero-mac,fluendo/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,ylatuya/cerbero,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,multipath-rtp/cerbero,lubosz/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,flexVDI/cerbero,OptoFidelity/cerbero,EricssonResearch/cerbero,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,ford-prefect/cerbero,sdroege/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,jackjansen/cerbero,ford-prefect/cerbero,davibe/cerbero,jackjansen/cerbero,ylatuya/cerbero,nicolewu/cerbero,davibe/cerbero,atsushieno/cerbero,sdroege/cerbero,justinjoy/cerbero,fluendo/cerbero,flexVDI/cerbero,jackjansen/cerbero-2013,jackjansen/cerbero-2013,freedesktop-unofficial-mirror/gstreamer__cerbero,flexVDI/cerbero,justinjoy/cerbero,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,superdump/cerbero,EricssonResearch/cerbero,jackjansen/cerbero,nzjrs/cerbero,OptoFidelity/cerbero,ramaxlo/cerbero,nzjrs/cerbero,GStreamer/cerbero,fluendo/cerbero,multipath-rtp/cerbero,ikonst/cerbero,BigBrother-International/gst-cerbero,justinjoy/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,multipath-rtp/cerbero,BigBrother-International/gst-cerbero,GStreamer/cerbero,centricular/cerbero,cee1/cerbero-mac,shoreflyer/cerbero,ramaxlo/cerbero,flexVDI/cerbero,ikonst/cerbero,nicolewu/cerbero,brion/cerbero,centricular/cerbero,fluendo/cerbero,brion/cerbero,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,BigBrother-International/gst-cerbero,nirbheek/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,EricssonResearch/cerbero,nirbheek/cerbero-old,jackjansen/cerbero-2013,centricular/cerbero,ford-prefect/cerbero,ikonst/cerbero,nirbheek/cerbero,flexVDI/cerbero,atsushieno/cerbero,ramaxlo/cerbero,nicolewu/cerbero,brion/cerbero,jackjansen/cerbero-2013,jackjansen/cerbero-2013,AlertMe/cerbero,GStreamer/cerbero,ramaxlo/cerbero