host: Add expose_env field to service manifest
host: Add expose_env field to service manifest

Environment variables listed in this field are copied from the daemon
environment into the job.

Signed-off-by: Jonathan Rudenberg <3692bfa45759a67d83aedf0045f6cb635a966abf@titanous.com>

pkdevbox/flynn,rikur/flynn,josephglanville/flynn,benbjohnson/flynn,whouses/flynn,benbjohnson/flynn,philiplb/flynn,technosophos/flynn,clifff/flynn,clifff/flynn,Brandywine2161/flynn,jzila/flynn,clifff/flynn,schatt/flynn,mubassirhayat/flynn,kgrz/flynn,arekkas/flynn,jzila/flynn,mubassirhayat/flynn,GrimDerp/flynn,Brandywine2161/flynn,jzila/flynn,technosophos/flynn,mubassirhayat/flynn,TribeMedia/flynn,lmars/flynn,kgrz/flynn,jzila/flynn,TribeMedia/flynn,lmars/flynn,Brandywine2161/flynn,rikur/flynn,philiplb/flynn,TribeMedia/flynn,GrimDerp/flynn,lmars/flynn,felixrieseberg/flynn,clifff/flynn,kgrz/flynn,rikur/flynn,ozum/flynn,felixrieseberg/flynn,supermario/flynn,flynn/flynn,justintung/flynn,schatt/flynn,shads196770/flynn,shads196770/flynn,philiplb/flynn,rikur/flynn,Brandywine2161/flynn,shads196770/flynn,rikur/flynn,pkdevbox/flynn,kgrz/flynn,technosophos/flynn,shads196770/flynn,GrimDerp/flynn,GrimDerp/flynn,pkdevbox/flynn,tonicbupt/flynn,schatt/flynn,arekkas/flynn,clifff/flynn,benbjohnson/flynn,schatt/flynn,benbjohnson/flynn,ozum/flynn,philiplb/flynn,ozum/flynn,TribeMedia/flynn,supermario/flynn,ozum/flynn,GrimDerp/flynn,flynn/flynn,pkdevbox/flynn,justintung/flynn,schatt/flynn,josephglanville/flynn,rikur/flynn,whouses/flynn,tonicbupt/flynn,justintung/flynn,arekkas/flynn,benbjohnson/flynn,kgrz/flynn,flynn/flynn,justintung/flynn,josephglanville/flynn,flynn/flynn,felixrieseberg/flynn,whouses/flynn,supermario/flynn,supermario/flynn,tonicbupt/flynn,kgrz/flynn,whouses/flynn,josephglanville/flynn,TribeMedia/flynn,whouses/flynn,whouses/flynn,ozum/flynn,justintung/flynn,shads196770/flynn,jzila/flynn,pkdevbox/flynn,supermario/flynn,felixrieseberg/flynn,josephglanville/flynn,pkdevbox/flynn,philiplb/flynn,lmars/flynn,supermario/flynn,schatt/flynn,lmars/flynn,Brandywine2161/flynn,ozum/flynn,tonicbupt/flynn,technosophos/flynn,clifff/flynn,tonicbupt/flynn,benbjohnson/flynn,shads196770/flynn,jzila/flynn,felixrieseberg/flynn,technosophos/flynn,arekkas/flynn,mubassirhayat/flynn,TribeMedia/flynn,GrimDerp/flynn,flynn/flynn,josephglanville/flynn,justintung/flynn,arekkas/flynn,Brandywine2161/flynn