Let menelaus proxy COPY requests
Let menelaus proxy COPY requests

Change-Id: I70506fe47b560d4f428819ba1d79da0a5cc18f99
Reviewed-on: http://review.couchbase.org/7973
Reviewed-by: Aliaksey Kandratsenka <340b8e09ca65cd3fc686427fcfed17e87eaf61e2@gmail.com>
Tested-by: Aliaksey Kandratsenka <340b8e09ca65cd3fc686427fcfed17e87eaf61e2@gmail.com>

membase/ns_server,vzasade/ns_server,mschoch/ns_server,ceejatec/ns_server,daverigby/ns_server,t3rm1n4l/ns_server,mschoch/ns_server,daverigby/ns_server,vzasade/ns_server,nimishzynga/ns_server,nimishzynga/ns_server,daverigby/ns_server,mschoch/ns_server,mschoch/ns_server,t3rm1n4l/ns_server,membase/ns_server,vzasade/ns_server,membase/ns_server,pavel-blagodov/ns_server,daverigby/ns_server,membase/ns_server,mschoch/ns_server,ceejatec/ns_server,ceejatec/ns_server,nimishzynga/ns_server,ceejatec/ns_server,t3rm1n4l/ns_server,ceejatec/ns_server,vzasade/ns_server,membase/ns_server,mschoch/ns_server,pavel-blagodov/ns_server,daverigby/ns_server,t3rm1n4l/ns_server,nimishzynga/ns_server,t3rm1n4l/ns_server,pavel-blagodov/ns_server,nimishzynga/ns_server,pavel-blagodov/ns_server,nimishzynga/ns_server,membase/ns_server,ceejatec/ns_server